The Woodward School for Girls, Inc. v. City of Quincy , 469 Mass. 151 ( 2014 )


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    SJC-11390
    THE WOODWARD SCHOOL FOR GIRLS, INC. vs.      CITY OF QUINCY,
    trustee, 1 & another. 2
    Norfolk.     December 2, 2013. - July 23, 2014.
    Present:    Spina, Cordy, Botsford, Gants, Duffly, & Lenk, JJ.
    Trust, Charitable trust, Investments, Trustee's accounts.
    Damages, Breach of fiduciary duty, Interest. Interest.
    Massachusetts Tort Claims Act. Governmental Immunity.
    Immunity from Suit. Municipal Corporations, Trusts,
    Governmental immunity. Waiver. Laches.
    Civil action commenced in the Supreme Judicial Court for
    the county of Suffolk on July 11, 2007.
    After transfer to the Norfolk County Division of the
    Probate and Family Court Department, the case was heard by
    Robert W. Langlois, J.
    The Supreme Judicial Court on its own initiative
    transferred the case from the Appeals Court.
    John S. Leonard (James S. Timmins, City Solicitor, with
    him) for city of Quincy.
    1
    Of the Adams Temple and School Fund and the Charles
    Francis Adams Fund.
    2
    Attorney General, as a nominal party.
    2
    Sarah G. Kim (Josephine M. Deang Chin & Alison K. Eggers
    with her) for the plaintiff.
    CORDY, J.    This dispute arises from a trust established in
    1822 by former President John Adams and supplemented by a
    bequest of his grandson in 1886.    The city 3 of Quincy (Quincy)
    served as trustee of the Adams Temple and School Fund and the
    Charles Francis Adams Fund (collectively, Funds) through two
    boards. 4   The Woodward School for Girls, Inc. (Woodward), the
    income beneficiary of the Funds since 1953, filed suit against
    Quincy initially seeking an accounting and thereafter asserting
    that Quincy committed a breach of its fiduciary duties to keep
    adequate records, invest the trust's assets properly, exercise
    reasonable prudence in the sales of real estate, and incur only
    reasonable expenses related to the management of the Funds.       We
    transferred the case here on our own motion following Quincy's
    appeal and Woodward's cross appeal from a Probate and Family
    3
    Quincy, originally a town, was incorporated as a city in
    1888.    See St. 1888, c. 347.
    4
    For the purposes of this opinion, the city of Quincy,
    along with the board of supervisors and the board of managers
    (together, joint boards) of the Funds at issue (the Adams Temple
    and School Fund, or Adams Fund, and the Charles Francis Adams
    Fund, collectively, Funds) are referred to collectively as
    "Quincy," except where differentiation is helpful.
    3
    Court judge's ruling removing Quincy as trustee and ordering it
    to pay a nearly $3 million judgment. 5
    On appeal, Quincy asserts that the trial judge erred in
    finding that Quincy committed a breach of its fiduciary duties
    to the Funds by failing to invest in growth equities to protect
    the principal when the Funds have only an income beneficiary to
    provide for, and by not heeding specific investment advice it
    received in 1973.   In addition, Quincy challenges the award of
    damages, alleging that it was based on an improperly introduced
    and unsound portfolio theory hypothesizing unrealized gains;
    that it failed to exclude reasonable costs and expenses Quincy
    would have incurred had Quincy followed that portfolio theory;
    and that it improperly included prejudgment interest dating back
    to the dates of the various breaches.    Finally, Quincy avers
    that Woodward's claims should have been barred by the
    Massachusetts Tort Claims Act, G. L. c. 258, § 4, and its
    accompanying protection of sovereign immunity, and by the
    equitable doctrine of laches.
    For the reasons discussed below, we conclude that the
    claims were not barred, and judgment against Quincy for
    committing a breach of its fiduciary duties to the Funds was
    proper, but the award of damages was erroneous in the
    5
    The parties have stipulated to the consolidation of the
    appeals.
    4
    calculation of unrealized gains on the investment portfolio.
    Specifically, we conclude that the judge erred in two respects:
    first in finding that Quincy's failure to heed specific
    investment advice it had solicited constituted a breach of its
    duty to act as a prudent investor, and second in calculating as
    damages the gains that might have been realized had Quincy
    followed that advice.   Nonetheless, because there was other
    evidence of Quincy's mismanagement of the Funds, the judge did
    not err in finding that Quincy had committed a breach of its
    fiduciary duties with regard to them.
    We further conclude that the judge did not err in including
    prejudgment interest or in declining to speculate as to
    potential costs or expenses Quincy may have incurred with proper
    management.   However, because the judge's calculation of damages
    with regard to the unrealized gains on the investment portfolio
    was based on his incorrect assumption that Quincy was required
    to follow specific investment advice, that calculation was in
    error.   Accordingly, we affirm the judgment as to liability,
    reverse with respect to the calculation of damages on the
    unrealized gains, and remand for further proceedings consistent
    with this opinion.
    Background.   In 1822, former President John Adams executed
    two deeds of trust, conveying a portion of his real estate
    holdings to a trust, thereafter named the Adams Temple and
    5
    School Fund (Adams Fund), and naming Quincy as the trustee.     The
    first deed executed by President Adams (Deed A) was supplemented
    by a bequest of his grandson, Charles Francis Adams, in 1886, to
    support the objectives of the Adams Fund (Charles Francis Adams
    Fund, and, collectively with the Adams Fund, Funds).   Deed A
    contained the basic provisions of the trust and directed the
    trustee to invest earnings from the real estate "in some solid
    public fund, either of the Commonwealth, or of the United
    States"; to build a church; and to apply "all future rents,
    profits, and emoluments, arising from said land" to support a
    school with particular requirements.   The only principal
    beneficiary identified in the deed was the oldest living male
    descendant of President Adams, who was to receive the principal
    only on "gross corruption or mismanagement," or knowing waste,
    on the part of Quincy.   Shortly after the deeds were executed,
    the inhabitants of Quincy voted to accept the gifts therein, and
    Quincy became the trustee.
    Two acts of the General Court granted Quincy further
    authority in executing its responsibilities as trustee of the
    Funds.   In 1827, the General Court appointed the treasurer of
    Quincy as the treasurer of the Adams Fund, incorporated the
    board of supervisors, and authorized the board of supervisors
    and the selectmen of Quincy to execute the intentions of
    President Adams and to receive and manage gifts from others for
    6
    the purposes articulated in the deeds.    See St. 1827, c. 59
    (1827 Act).   Quincy thereafter established a board of managers
    for the Adams Fund. 6   In 1898, the General Court authorized
    Quincy as trustee of the Funds to sell and convey the Funds'
    real property holdings and to "invest[] and re-invest[]" the
    sale proceeds "from time to time . . . in real estate or in such
    securities as trustees are authorized to hold in this
    Commonwealth."   See St. 1898, c. 102 (1898 Act).
    In 1953, pursuant to an unpublished order of this court,
    after three prior income beneficiaries, Woodward was designated
    (and remains) the sole income beneficiary of the Funds. 7
    6
    The board of managers of the Adams Fund was comprised of
    the mayor of Quincy, the president of the city council, the
    treasurer and collector, and two members elected annually by the
    city council. See § 2.144.020 of the General Ordinances of the
    City of Quincy. It appears that whereas the board of
    supervisors and the board of managers shared responsibility for
    overseeing the Adams Fund, only the board of supervisors oversaw
    the Charles Francis Adams Fund.
    7
    The Woodward School for Girls, Inc. (Woodward), was
    established and operated by the Woodward Fund, a trust created
    by the will of Dr. Ebenezer Woodward, a cousin of President John
    Adams, in 1894. This fund was also managed by Quincy, but its
    board of managers was separate from those of the Funds. In
    1952, Quincy filed a petition asking that the Funds be used to
    benefit Woodward, which was experiencing financial troubles.
    This court granted the petition and ordered that "the net income
    from the [Funds] . . . be paid to and expended by the City of
    Quincy in its capacity as trustee of the Woodward Fund and
    Property for the conduct, operation, maintenance, management,
    and advancement of the Woodward School for Girls." The Woodward
    Fund was subsequently liquidated. In his findings in the
    present dispute, the judge noted that the cy pres decree "did
    not . . . provide a requirement for any annual, quarterly, or
    7
    1.   Investment advice and state of Funds.   By the time
    Woodward became the beneficiary of the Funds, the real estate
    holdings of the Adams Fund had diminished significantly,
    presumably due to sale.   At the end of 1952, the assets of the
    Adams Fund consisted of $4,474 in cash, $253,723.02 in
    investment assets, and an assessed value of $102,325 in real
    estate.   The value of the Adams Fund's investment assets in 1973
    totaled $321,932.43, an increase that may have been attributable
    to the further sale of real estate.   In April, 1973, the Adams
    Fund investment assets were invested in a portfolio consisting
    of ninety per cent fixed income and ten per cent equity
    securities.   That month, Quincy received investment advice it
    had requested from the South Shore National Bank (bank) with
    regard to managing the Funds' investment portfolio.    The joint
    boards of the Funds unanimously voted to adopt an agreement
    establishing an advisory relationship with the bank and to
    follow certain diversification investment advice it received
    from the bank.   However, Quincy never implemented the
    diversification recommendations, and instead, by 1990, nearly
    one hundred per cent of the Adams Fund's assets were invested in
    fixed income instruments.   In 2008, the value of the investment
    even periodic, income payments from the [Funds] to the Woodward
    School."
    8
    assets in the Adams Fund was reportedly still the same:
    $321,932.43.
    The assets of the Charles Francis Adams Fund, which are far
    smaller than those of the Adams Fund, have diminished somewhat
    over time.   As of 1953, the Fund had a value of $23,428,
    consisting of $1,453 in cash and $21,975 in securities
    (primarily in corporate bonds).   It has since declined to
    $19,982 as of 2005, when it consisted of $2,530 in cash and
    $17,452 in investments. 8
    Despite the lack of growth in the Funds, between 1953 and
    2008, the Funds generated over $700,000 in income; this income
    was either paid to Woodward directly or used to pay the Funds'
    expenses.
    2.   Request for accounting and present litigation.    The
    present dispute began in 2005, when Woodward had, for two
    consecutive years, received a smaller distribution from the
    Funds than it had anticipated.    In light of these discrepancies,
    the chair of the Woodward board of trustees requested an
    accounting of the Funds from Quincy.   As of nearly one and one-
    half years later, the school had received some information from
    8
    As of 1962, the Charles Francis Adams Fund had a value of
    $24,323. The Fund hovered in this range until 1977, when it
    dropped to $19,542. As of 1984, the Fund contained $21,975.
    9
    Quincy but not a full accounting, which it again requested. 9   In
    July, 2007, after still receiving no response, Woodward filed a
    complaint and petition for an accounting with a single justice
    of this court against Quincy as trustee of the Funds.   Woodward
    asserted that "as beneficiary of the Funds, [it] is entitled to
    know, the real and financial assets currently in the Funds,
    information about the Funds' management, and historically what
    has happened to the Funds' assets and income."   The single
    justice transferred the case to the Norfolk County Division of
    the Probate and Family Court Department.
    A judge in that court appointed a special master to gather
    relevant documents regarding the Funds' assets, prepare an
    accounting for the Funds for the period of 1953 to 2008,
    inclusive, and issue a report assessing the propriety of the
    Funds' transactions.   See G. L. c. 206, § 2; Rule 20 of the
    Rules of the Probate and Family Court, Massachusetts Rules of
    Court, at 1051 (Thomson Reuters 2014).   Overall, the special
    master concluded that Quincy had committed a breach of its
    fiduciary duties in several respects, primarily because it had
    "not maintained adequate books and records to substantiate its
    9
    Quincy had never previously provided an accounting of its
    stewardship of the Funds to Woodward.
    10
    stewardship as Trustee," and it had sold the Funds' real
    property at less than fair market value. 10,11
    10
    This accounting and report was supplemented by that of a
    certified public accountant, who was retained to assist the
    special master. Incorporating the accountant's findings, the
    special master made numerous findings, the most relevant of
    which are summarized here. First, he determined that the return
    generated by the Funds' investments was "comparable to the
    market return of similar investments." Second, he concluded
    that $85,090 in income from the Adams Fund that was not
    distributed to Woodward "was maintained in the Fund and
    reinvested in market rate instruments," and that $18,864 in
    income from the Charles Francis Adams Fund was wrongly withheld
    from Woodward. Third, he concluded that real property sales
    conducted between 1953 and 1972 were below fair market value,
    and that the only remaining parcel of real property held by the
    Funds was leased at less than fair market rent. Fourth, he
    determined that Quincy's expenses were significant and required
    justification. Finally, the special master concluded that
    Quincy committed a breach of its duty of care to Woodward and
    "may have violated its duty to prudently invest trust assets"
    with regard to the land sales between 1955 and 1972; committed
    a breach of "its duty of loyalty to Woodward when it engaged in
    business dealings which caused trust property to be sold for
    below fair market value"; committed a breach of its duty to
    furnish information to beneficiaries "by not informing Woodward
    of the 1972 petition concerning the lease" of real property
    owned by the Funds, which was not a prudent investment, and by
    not providing an actual accounting when Woodward requested one
    until ordered to do so by the court; and committed a breach of
    its duty to keep accurate records and provide reports. In a
    supplemental report filed after receipt of additional
    documentation, the special master concluded that Quincy "did not
    adhere to the investment mandates" articulated in Deed A and
    "varied the investment portfolio between equities and bonds"
    when the deed seemed to limit investments to bonds only. The
    special master also noted that the fifty-five year accounting
    period at issue exceeded the recommended record retention period
    and therefore questioned the timeliness of Woodward's challenge
    to Quincy's actions as trustee.
    11
    The trial judge subsequently gave "presumptive weight" to
    the special master's findings and conclusions. See
    Mass. R. Civ. P. 53 (h) (1), as amended, 
    386 Mass. 1237
    (1982).
    11
    Following the report of the special master, the dispute
    proceeded to a thirteen-day bench trial.    In February, 2011, an
    amended judgment and amended findings entered, with 220 findings
    of fact.
    The judge concluded that Quincy failed to keep accurate
    records of its financial stewardship of the Funds, to obtain
    appraisals for real property and to sell parcels at fair market
    value or greater, 12 to act on professional investment advice it
    received, and to comport with its duty of loyalty to the Funds.
    The judge characterized Quincy's management of the Adams Fund
    specifically as "inattentive, imprudent and neglectful," but not
    so neglectful as to "rise to the level of gross corruption or
    gross mismanagement," such that the remainder beneficiary would
    take the trust property.
    With regard to Quincy's investment strategy for the Adams
    Fund, the judge made several findings relevant to Quincy's
    appeal. 13   First, he concluded that Quincy did not commit a
    12
    With regard to Quincy's real estate sales on behalf of
    the Adams Fund, the judge concluded that Quincy failed to fulfil
    its duty to sell realty for the best possible price, or at least
    for fair market value, and instead prioritized its own municipal
    needs.
    13
    With regard to the investment strategy for the Charles
    Francis Adams Fund, the judge concluded that even though the
    Fund's corpus had declined by nearly fifteen per cent between
    1953 and 2005, it appeared that Quincy had made "a modest effort
    to pay income of this relatively basic trust over to the
    12
    breach of its fiduciary duty to the Funds by employing
    inappropriate investment strategies during the years of 1953 to
    1973. 14   Second, with regard to the 1973 investment advice Quincy
    received from the bank, the judge found that Quincy received and
    unanimously voted to adopt a single portfolio diversification
    plan, consisting of sixty per cent in equity securities, thirty-
    five per cent in fixed income, and five per cent in savings (60-
    35-5 plan).    He concluded that Quincy failed to follow this
    directive, and that it "ignored the terms of its own April 11,
    1973, vote, and the competent, professional . . . advice
    contained therein, to the considerable detriment of the [Adams
    Fund]."    Therefore, Quincy acted imprudently and in violation of
    its fiduciary duties.
    Third, the judge found that it was imprudent for Quincy to
    permit the Adams Fund to consist almost entirely of fixed income
    and cash assets by 1990.    The judge rejected Quincy's assertion
    that it maintained the Fund's assets in government securities in
    order to comport with the explicit directive of the trust
    instrument; rather, the judge concluded that the Fund had acted
    in derogation of the 1892 legislation directing Quincy to invest
    Woodward School." The judge therefore declined to speculate as
    to any loss in income received by Woodward from this Fund.
    14
    Nonetheless, the judge expressed "serious reservations
    and concerns" regarding the investment approach employed during
    this period.
    13
    real estate sales proceeds "in real estate or in . . .
    securities," by instead investing "the fungible portion of the
    trust corpus in corporate bonds as well as in
    equities/securities." 15
    In light of these findings, the judge awarded Woodward a
    total judgment of $2,994,868, including prejudgment interest of
    $1,610,826 and approximately $1.1 million for "[u]nrealized
    [g]ains in portfolio," and removed Quincy as trustee of the
    Funds. 16
    15
    This finding departed from the special master's finding
    on this issue.
    16
    The $2,994,868 total judgment was calculated as follows:
    $255,566 in miscellaneous damages due to financial
    mismanagement, including recoupment of funds not received by the
    Adams Fund as a result of sales of real estate below fair market
    value, unrealized income from the sale of a particular parcel,
    the value of "missing" funds from the South Shore National Bank
    (bank) account where the trust assets were held and from
    unreported stock gains, and recoupment of an unexplained account
    deficiency; $1,135,494 for the unrealized gain in the investment
    portfolio; and a total of $1,610,826 in prejudgment interest on
    these items ($475,426 on the miscellaneous damages combined, and
    $1,135,400 on the unrealized gains); less a credit for
    disallowed expenses of $7,018. Quincy's argument on appeal
    focuses primarily on the unrealized gains and the prejudgment
    interest portions of the award of damages. It appears to
    concede that if the Massachusetts Tort Claims Act, G. L. c. 258,
    §§ 1 et seq., does not bar the award, Quincy would remain
    responsible for $119,271 of the $255,566 miscellaneous damages
    (the amount attributable to unrealized income from the sale of a
    particular parcel and the unexplained account deficiency), plus
    certain prejudgment interest on that amount. Quincy asserts
    that the remainder of the $255,566 (attributable to below-market
    real estate sales and missing accounts and gains) is barred by
    laches.
    14
    Discussion.   We will not disturb the findings of the trial
    judge or the special master unless they are clearly erroneous.
    Mass. R. Civ. P. 52 (a), as amended, 
    423 Mass. 1402
    (1996).       See
    Chase v. Pevear, 
    383 Mass. 350
    , 359-360 (1981); Matter of Jones,
    
    379 Mass. 826
    , 839 (1980).   "A finding [of fact] is clearly
    erroneous . . . [if], although there is evidence to support it,
    the reviewing court on the entire evidence is left with the
    definite and firm conviction that a mistake has been committed"
    (quotations and citations omitted).     Demoulas v. Demoulas Super
    Mkts., Inc., 
    424 Mass. 501
    , 509 (1997).
    1.   Breach of fiduciary duties.    The primary issue in this
    case is whether the judge erred in concluding that Quincy
    committed a breach of its fiduciary duties by failing to invest
    in growth securities and by failing to heed investment advice it
    procured from an investment adviser.     Because trustees' conduct
    with regard to investment strategy and decision-making is
    governed by the prudent investor standard, we begin by
    articulating what that standard requires.
    a.   Prudent investor standard.    A trustee's obligations
    with regard to investing and managing a trust's assets are
    dictated by our common law and by the Massachusetts Prudent
    Investor Act, G. L. c. 203C, §§ 1 et seq.     See Kimball v.
    15
    Whitney, 
    233 Mass. 321
    , 331 (1919); Harvard College v. Amory, 
    9 Pick. 446
    , 461 (1830). 17
    A trustee has a duty to invest the trust's assets "solely
    in the interest of the beneficiaries."   G. L. c. 203C, § 6.    In
    performing this duty, a trustee must "exercise reasonable care,
    skill, and caution" in "invest[ing] and manag[ing] trust assets
    as a prudent investor would, considering the purposes, terms,
    and other circumstances of the trust."   
    Id. at §
    3 (a).   Among
    those considerations are "the possible effect of inflation or
    deflation"; "the expected total return from income and the
    appreciation of capital"; "other resources of the
    beneficiaries"; and "needs for liquidity, regularity of income,
    and preservation or appreciation of capital."   
    Id. at §
    3 (c) (2), (5)-(7).   See O'Brien v. Dwight, 
    363 Mass. 256
    ,
    17
    Because the Massachusetts Prudent Investor Act, G. L.
    c. 203C, §§ 1 et seq. (Act), applies only "to decisions or
    actions of a trustee occurring on or after" the 1998 effective
    date of the Act, we apply the standards of both the common law
    and the Act and note distinctions where relevant. See St. 1998,
    c. 398, § 3, inserting G. L. c. 203C. In many respects, the Act
    mirrors the common-law doctrine that has existed since the mid-
    1800s. See Harvard College v. Amory, 
    9 Pick. 446
    , 461 (1830).
    See also Chase v. Pevear, 
    383 Mass. 350
    , 363 (1981). However,
    the Act introduced two significant changes: permissive
    delegation of duties, and the modern portfolio theory, which
    recognizes inflation as a factor to be considered in portfolio
    management decision-making and therefore shifts the assessment
    of a trustee's actions to the over-all construction of the
    portfolio. See Taylor, Massachusetts' Influence in Shaping the
    Prudent Investor Rule for Trusts, 
    78 Mass. L
    . Rev. 51, 51-52 &
    n.5 (1993). Compare Chase, supra at 364 (assessing each
    investment individually, but with some consideration of "the
    fund as a whole" [citation omitted]).
    16
    294-295 (1973).     We assess investment decisions in the context
    of the over-all investment strategy of the trust. 18   G. L.
    c. 203C, § 3 (b).    See Restatement (Third) of Trusts § 90
    (2007).
    A trustee exercising "reasonable care, skill and caution,"
    G. L. c. 203C, § 3 (a), undoubtedly will approach investment
    decisions with some conservatism.    This, however, must be
    balanced with a degree of risk in order to obtain income for the
    trust and protect the principal against inflation.     See
    Restatement (Third) of 
    Trusts, supra
    at § 90 comment e;
    Restatement (Second) of Trusts § 227 comment e (1959).
    Diversification of investments is therefore considered a central
    component of prudent investment because it both moderates and
    reduces risks.    See G. L. c. 203C, § 4; 
    Chase, 383 Mass. at 363
    .
    Accordingly, trustees are discouraged from investing "a
    disproportionately large part of the trust estate in a
    particular security or type of security."    Restatement (Second)
    of 
    Trusts, supra
    at § 228 comment a.    Nonetheless, the standard
    recognizes that in some circumstances, it may not be prudent to
    diversify an investment portfolio, particularly where "the
    objectives of both prudent risk management and impartiality can
    be satisfied" without diversification.    Restatement (Third) of
    18
    For actions occurring prior to 1998, we evaluate each
    investment individually, but also consider investments in the
    context of the trust as a whole. See 
    Chase, 383 Mass. at 364
    .
    17
    
    Trusts, supra
    at § 90 comment g.    See G. L. c. 203C, § 4;
    Restatement (Second) of 
    Trusts, supra
    .
    b.   Investment advice.   We turn now to Quincy's first claim
    of error.   Quincy contends that the judge erred in concluding
    that Quincy was required to follow specific investment advice it
    requested and received in 1973.    In addition, it asserts that
    the judge misconstrued the investment advice at issue as
    providing only one recommendation, when the advice actually
    consisted of several alternatives, one of which Quincy claims to
    have followed.   We agree that the judge improperly considered
    strict compliance with investment advice to be required of a
    prudent investor.   We do not, however, consider the judge's
    interpretation of the advice provided to be clearly erroneous.
    The investment advice in dispute was provided by the bank
    in a letter dated March 29, 1973, and reviewed by the joint
    boards of the Funds at a meeting on April 11. 19   The letter was
    interpreted by the trial judge as providing a single
    diversification recommendation of sixty per cent equity
    securities, thirty-five per cent fixed income, and five per cent
    savings (60-35-5 plan). 20   This represented a drastic change from
    19
    Quincy had requested this advice after receiving guidance
    from its legal counsel that it was permissible to seek
    professional advice regarding investments, but that Quincy would
    retain responsibility for making investment decisions.
    18
    the Adams Fund's portfolio at the time of ninety per cent fixed
    income and ten per cent equity securities.    On receiving the
    investment advice, the joint boards unanimously voted to enter
    into an advisory relationship with the bank, 21 and to "mak[e]
    investments and changes of investments in said Funds
    substantially within the outline as presented" by the bank in
    its letter. 22   However, Quincy did not make changes to its
    20
    The letter lends itself to several interpretations. It
    ambiguously refers to three proposals, giving some credence to
    Quincy's suggestion that the letter did not provide only one
    directive. We agree with Quincy that one of the proposals
    included in the letter was for "a modest upgrading of the
    balance of the bond portfolio into higher rate bonds," which
    Quincy purports to have followed. However, we are not persuaded
    that the recommendations contained in the letter were meant to
    be alternatives rather than complements to each other. Our own
    review of the letter suggests that the primary emphasis with
    regard to the Adams Fund was the adoption of a diversification
    plan consisting of sixty per cent in equity securities, thirty-
    five per cent in fixed income, and five per cent in savings (60-
    35-5 plan). Accordingly, the judge's understanding of the
    letter as providing this recommendation is plausible and not
    clearly erroneous.
    21
    The agreement authorized the bank "to review periodically
    and to advise or recommend to [Quincy] the retention, sale or
    exchange of the securities and other property in the [Funds] and
    to advise or recommend the purchase of stocks, bonds and other
    securities." The agreement indicated that Quincy would
    ultimately be responsible for making decisions regarding "the
    acquisition or disposition of securities and other property."
    22
    The trial judge found that the boards adopted the
    specific 60-35-5 diversification proposal discussed above.
    However, the meeting minutes do not reflect such a precise vote.
    Accordingly, we conclude that the boards did not adopt any
    specific reading of the investment advice provided in the letter
    but rather resolved to follow more generally the advice
    provided.
    19
    portfolio consistent with the advice it received, and instead
    increased the percentage of investments in fixed income assets
    so that, by 1990, nearly one hundred per cent of the assets of
    the Adams Fund were in fixed income investments. 23
    Under both the common law and the Prudent Investor Act, a
    trustee is permitted to consult with and receive advice from
    accountants and financial advisers.   See G. L. c. 203C,
    § 10 (a); Milbank v. J.C. Littlefield, Inc., 
    310 Mass. 55
    , 62
    (1941) ("A trustee may avail himself of the services of
    others"); Restatement (Third) of 
    Trusts, supra
    at § 77 comment b
    & § 80 comment b.   Cf. Rothwell v. Rothwell, 
    283 Mass. 563
    , 571
    (1933) (trust disbursements paying agents and attorneys who
    assisted in trust management were appropriate); Hanscom v.
    Malden & Melrose Gas Light Co., 
    234 Mass. 374
    , 381 (1920)
    (same).
    Indeed, consulting investment advisers may be part of
    acting prudently and exercising care.   See Restatement (Third)
    of 
    Trusts, supra
    at § 77 comment b.   "After obtaining advice or
    consultation, the trustee can properly take the information or
    suggestions into account but then (unlike delegation) must
    exercise independent, prudent, and impartial fiduciary judgment
    23
    Although Quincy avers that it followed some of the advice
    in the letter by upgrading the Adams Fund's bond portfolio to
    higher rate bonds, as noted above we are not persuaded that this
    was more than a secondary component of the bank's broader
    diversification recommendation.
    20
    on the matters involved."    
    Id. at §
    80 comment b.   See Attorney
    Gen. v. Olson, 
    346 Mass. 190
    , 197 (1963) (trustee may employ
    bank as investment agent, as long as trustee gives independent
    consideration to agent's recommendation).    In contrast, were we
    to require a trustee to follow investment advice it receives, we
    would in effect mandate delegation of a trustee's fiduciary
    duties. 24   We decline to require a trustee to abdicate this
    fundamental function of a trustee to make investment decisions
    merely because the trustee seeks advice on acting prudently.
    See Boston v. Curley, 
    279 Mass. 549
    , 562 (1931).      However
    prudent the advice may be, a trustee is not required to follow
    it.   To the extent the judge considered the failure to follow
    specific advice a per se breach of Quincy's fiduciary duty of
    prudent investment, this was in error.
    Whether a trustee requested and followed specific
    investment advice is but one factor in the determination of
    whether the trustee acted prudently.    Receipt of sound
    investment advice and dismissal or wilful ignorance of it, where
    the advice was at the time prudent and consistent with the trust
    24
    The common law and the Prudent Investor Act take
    different approaches to delegation of a trustee's
    responsibilities. Compare G. L. c. 203C, § 10 (a) (permitting
    trustee to "delegate investment and management functions if it
    is prudent to do so"), with Milbank v. J.C. Littlefield, Inc.,
    
    310 Mass. 55
    , 62 (1941) (trustee may not "delegate his authority
    as trustee"), and Boston v. Curley, 
    276 Mass. 549
    , 562 (1931).
    Merely receiving, considering, and adopting investment advice,
    however, does not constitute delegation under either standard.
    21
    beneficiary's needs and goals, may be indicative of a lack of
    prudent investing.   But such action or inaction in and of itself
    does not rise to the level of imprudent investing.     The judge's
    reliance on the 1973 investment advice as a default prudent
    investment strategy resulted in inadequate consideration of the
    range of investment strategies that would have been prudent for
    the Adams Fund. 25
    c.   Concern for principal of income-only fund.   Quincy also
    challenges the trial judge's finding that it committed a breach
    of its fiduciary duty by not investing in growth securities.    It
    asserts that as the trustee of a fund with only an income
    beneficiary, it had a "duty to maximize income, even at the risk
    of sacrificing growth," and therefore it was not obligated to
    invest in growth equities that would protect the principal from
    inflation.   It claims that it acted prudently in structuring the
    Adams Fund's investment portfolio as it did because the Fund
    produced income for Woodward, and the investments comported with
    the trust instrument's direction to invest the majority of the
    Fund's assets in government-backed bonds.
    The judge's findings regarding the Adams Fund's investment
    portfolio demonstrate that the Fund has been primarily invested
    25
    We reserve our discussion of the impact of Quincy's
    failure to follow the bank's investment advice for a more
    holistic analysis of whether it acted prudently. See part 1.d,
    infra.
    22
    in fixed income assets since Woodward became the income
    beneficiary.   As a result, the value of the Fund has remained
    largely unchanged since 1973.   Despite this lack of principal
    growth, between 1973 and 2008, the Funds generated over $700,000
    in income, benefiting from a 7.54 per cent rate of annual
    return, which was either paid to Woodward directly or used to
    pay the Funds' expenses.   Nonetheless, the judge found that it
    was imprudent for Quincy "to permit, by 1990, the [Adams Fund]
    to consist of essentially 100% fixed income/cash assets," and
    that this imprudence significantly harmed the Adams Fund.
    Where, as here, the current beneficiary of a trust is an
    income-only beneficiary, courts in at least three other
    jurisdictions with similar prudent investor standards have
    concluded that a trustee owes a duty to that beneficiary to
    prioritize income over growth, and that investing in fixed
    income assets over equities is not a breach of fiduciary duty
    where such investments produce income for the beneficiary but
    may fail to maintain the principal against inflation.   See
    Tovrea v. Nolan, 
    178 Ariz. 485
    , 490 (Ct. App. 1993); SunTrust
    Bank v. Merritt, 
    272 Ga. App. 485
    , 488-489 (2005); In re Trust
    Created by Martin, 
    266 Neb. 353
    , 359-360 (2003).   See also Shirk
    v. Walker, 
    298 Mass. 251
    , 257-258 (1937).   This comports with
    the obligation under G. L. c. 203C, § 6, to invest for the
    benefit of the beneficiaries.
    23
    Although trustees in such cases are required to balance the
    interests of successive beneficiaries, one of whom is to receive
    the income during his or her lifetime and the other of whom is
    to take the principal on the income beneficiary's death, these
    courts have consistently concluded that a trustee does not
    commit a breach of a fiduciary duty "by investing the trust in
    such manner as to maximize the income payable to [the income
    beneficiary] rather than expand the corpus of the trust."
    SunTrust 
    Bank, 272 Ga. App. at 489
    .    See 
    Tovrea, 178 Ariz. at 490
    ("trustees' duty was [primarily] to invest in such a manner
    as to produce an income for [income beneficiary] and,
    secondarily, [to] preserve the principal").
    In theory, the case for maximizing income over growth is
    even stronger here, because the income beneficiary is an
    institution and the remainder beneficiary takes only upon "gross
    corruption or mismanagement . . . notorious negligence, or any
    waste knowingly permitted," thereby justifying complete
    attention to the interests of Woodward.    See G. L. c. 203C, § 6.
    However, the Adams Fund's status as a charitable trust and
    Woodward's institutional status makes this case distinctly
    different from those involving trusts with a lifetime
    beneficiary.
    A charitable trust such as this one is designed to support
    an income beneficiary in perpetuity.    See Jackson v. Phillips,
    24
    
    14 Allen 539
    , 550 (1867) (charitable trusts exempt from rule
    against perpetuities).   As a result, the trustee must
    necessarily consider both the generation of income and the
    growth and maintenance of the principal in order to provide
    income funds to the beneficiary indefinitely.   See Restatement
    (Third) of 
    Trusts, supra
    at § 90 comment e ("In balancing the
    return objectives between flow of income and growth of
    principal," trustee must consider trust's "purposes and
    distribution requirements").   In effect, Woodward is equivalent
    to both the lifetime income beneficiary and all subsequent
    beneficiaries.
    As such, acting prudently in managing a charitable trust
    that benefits an institutional income beneficiary requires
    considering the specific needs of the beneficiary in the short
    and long term and balancing prioritization of income with
    protection and preservation of the principal.   At a minimum, a
    trustee must consider how best to guard the principal against
    inflation, if not how to grow the principal while simultaneously
    generating income to support the beneficiary.   Where the income
    beneficiary will continue to exist in perpetuity, the mandate of
    G. L. c. 203C, § 3 (a), to act with "caution" necessarily
    entails considering "the possible effect of inflation or
    deflation," 
    id. at §
    3 (c) (2), and the "preservation or
    appreciation of capital," 
    id. at §
    3 (c) (7).   A trustee must
    25
    accordingly "invest with a view both to safety" -- "seeking to
    avoid or reduce loss of the trust estate's purchasing power as a
    result of inflation" -- and "to securing a reasonable return."
    Restatement (Third) of 
    Trusts, supra
    at § 90 comment e.
    In this case, a prudent investor would have realized at
    some point, long before 2008, that a fund value that is
    unchanged for decades after 1953 has not kept up with inflation,
    and, given the potential perpetuity of the income beneficiary's
    needs, would have taken or attempted to take steps to protect
    the principal in order to preserve future income opportunities.
    If Quincy recognized that the Adams Fund was vulnerable to
    inflation, likely attributable to its lack of diversification,
    it had a duty to determine which of its assets could be invested
    in a manner that would guard against this vulnerability.   At a
    minimum, Quincy could have invested the proceeds from the sale
    of real estate in investments that would potentially protect the
    principal.   See St. 1898, c. 102.   Instead, Quincy chose to keep
    the Adams Fund's investment assets exclusively in bonds, which
    produced a higher rate of return than a more diversified
    portfolio but resulted in stagnation of the trust principal. 26
    26
    Quincy asserts that the terms of the trust instrument,
    Deed A, required it to invest most of the principal, with the
    exception of real property sales proceeds, in State and Federal
    bonds. Under the Prudent Investor Act, a trustee may be
    relieved from the obligations set forth in the Act where the
    trust instrument requires the trustee to act otherwise and "the
    26
    Where, in most instances, an increase in principal will lead to
    an increase in income, this decision not to diversify was
    imprudent in light of the Adams Fund's need to support Woodward
    in perpetuity and not merely during a human lifetime.   Even
    without the benefit of hindsight, see G. L. c. 203C, § 9, it is
    clear that Quincy did not take any steps to protect the Adams
    Fund's principal against inflation.   We therefore conclude that
    Quincy's failure to protect the principal against inflation
    alone was sufficient to constitute a breach of its fiduciary
    duty.
    trustee acted in reasonable reliance on the provisions of the
    trust." G. L. c. 203C, § 2 (b). See Restatement (Second) of
    Trusts § 228 comment f (1959) ("By the terms of the trust the
    requirement of diversification may be dispensed with").
    However, we are not persuaded that Quincy's complete reliance on
    this particularly restrictive trust provision was reasonable.
    Quincy failed to keep adequate records reflecting which assets
    could be invested only in bonds and which assets could be more
    broadly invested and used to diversify the portfolio and secure
    the principal against inflation. Instead, Quincy invested
    nearly all of its assets in bonds, which undoubtedly exceeded
    the allocation that was required by the trust.
    Further, if the express terms of the trust proved too
    restrictive to achieve the trust's goals, Quincy could have
    appealed to the court to revise the trust's terms to better
    serve its original purpose. See Trustees of Dartmouth College
    v. Quincy, 
    357 Mass. 521
    , 531 (1970) ("courts of equity" have
    general power "in the administration of charitable trusts to
    permit deviations short of cy pres applications"); Briggs v.
    Merchants Nat'l Bank of Boston, 
    323 Mass. 261
    , 274-275 (1948)
    (applying cy pres doctrine because "[equity] will presume that
    the donor would attach so much more importance to the object of
    the gift than to the mechanism by which he intended to
    accomplish it that he would prefer to alter the mechanism to the
    extent necessary to save the object").
    27
    d.   Quincy's over-all performance.   As the above
    discussions illustrate, Quincy engaged in several shortcomings
    in its management of the Adams Fund's investment portfolio that
    indicate that it failed to perform as a prudent investor would
    under the circumstances.   See G. L. c. 203C, § 3 (a).    Although
    Quincy sought and received ongoing investment advice from the
    bank in 1973 and thereafter, 27 it does not appear that it ever
    heeded the most significant, and seemingly prudent, advice the
    bank provided, construed in even the most general terms:    to
    diversify the Adams Fund's portfolio in such a way that would
    decrease slightly the annual rate of return but would realize
    some appreciation for the principal.   This factor, while not
    dispositive, is illustrative of Quincy's general lack of
    consideration of diversification, long considered a prudent
    investment strategy, see G. L. c. 203C, § 4; 
    Chase, 383 Mass. at 363
    , and its disregard for both the 1898 legislative directive
    and the long-term needs of the income beneficiary.
    We are not persuaded that Quincy was prohibited from
    following this advice or from otherwise diversifying the Adams
    Fund's portfolio by the restrictions in the trust instrument.
    See note 
    26, supra
    .   Rather, as Quincy's legal counsel observed
    27
    The board meeting minutes reflect that an investment
    representative from the bank attended the board meetings and
    provided reports to Quincy in the decades following the 1973
    advice.
    28
    and as the 1898 Act required, Quincy was in fact directed to
    invest the real estate sale proceeds "in real estate or in such
    securities as trustees are authorized to hold in this
    Commonwealth."    St. 1898, c. 102, § 2.   The limitation
    articulated in Deed A of investing in government-issued bonds
    did not apply to these proceeds.     Thus, contrary to Quincy's
    assertion that it was following the restrictions on the
    investment of the Adams Fund, its nearly complete investment in
    bonds suggests that Quincy actually contravened the applicable
    investment restrictions.
    Finally, and most significantly, Quincy failed to invest
    with the long-term needs and best interests of the income
    beneficiary in mind, creating a portfolio that consistently
    provided income but that left the principal vulnerable to
    inflation and, as a result, depreciation.    See Harvard 
    College, 9 Pick. at 458
    .   Accordingly, based on these considerations, the
    judge's ruling that Quincy committed a breach of its fiduciary
    duty of prudent investment was not clearly erroneous.
    2.   Award of damages.    We turn next to Quincy's allegations
    of error in the theory and calculation of the award of damages.
    a.   Theory of damages.   Quincy contends that the judge
    improperly devised a new liability theory, that of Quincy's
    failure to achieve any capital appreciation for the Adams Fund,
    that had not previously been an issue in the case.    Quincy avers
    29
    that by "injecting" this issue into the case, enabling Woodward
    to assert the issue by permitting its expert witness to testify
    based on the theory, and making a finding based on this
    testimony, the judge engaged in an inappropriate fact-finding
    method and denied Quincy an adequate opportunity to prepare to
    defend against the theory.    We agree with Woodward that the
    issue of lack of capital appreciation was present from the
    beginning of the litigation, and further note that even if it
    were not, a judge has the authority to raise an issue in the
    case as long as adequate notice is afforded to the parties.
    We begin with a brief description of what transpired.     On
    the second day of trial, in the presence of counsel, the judge
    indicated his disbelief that the Adams Fund's principal would
    not have grown significantly over the course of nearly sixty
    years. 28   He then proceeded to ask counsel a number of rhetorical
    but relevant questions about why the value of the Adams Fund had
    not appreciated, speculating that perhaps various stock
    28
    Specifically, the judge stated, "It is inconceivable to
    me that the value of the portfolio has not doubled, tripled,
    quadrupled over [sixty] years." He observed that there had been
    no growth in the Adams Fund's portfolio but that "[t]he
    investments seemed reasonable" and "didn't seem inappropriate."
    In encouraging the parties to seek a settlement, the judge noted
    that he had "no idea what the end result of this case [was]
    going to be" and that it was "unusual that a trust fund, whereby
    there would be no invasion of the principal, doesn't grow over
    [sixty] years of an incredible period of time of growth in the
    country. . . . It is inconceivable that there would not be an
    increase."
    30
    investments had been made that did, at least temporarily, lead
    to some appreciation, the value of which was then lost through
    unsuccessful investments, but that such transactions were simply
    not reflected in the Fund's records.   Quincy asserts that these
    statements "injected" the issue of capital appreciation into the
    case.
    Thereafter, Woodward identified Scott Winslow as an expert
    witness who would testify that the Adams Fund's investment
    portfolio, being primarily invested in bonds, was such that it
    resulted in significant underperformance.   Quincy moved to
    exclude Winslow's testimony, asserting that it "would introduce
    a new issue in the middle of trial."   In opposition, Woodward
    contended that Winslow's testimony would "respond to the Court's
    questions regarding why it was that despite a period of
    extraordinary growth in the economy, the principal of [the
    Funds] did not increase in value."   Woodward further asserted
    that capital appreciation had been an issue from the beginning.
    The judge denied the motion but ultimately limited Winslow's
    testimony on this issue to whether the investments were
    consistent with the advice Quincy had received from the bank,
    and prohibited Winslow from testifying about a theoretical
    proposal that Quincy could have followed.
    Winslow testified that, had Quincy employed the 60-35-5
    diversification plan recommended by the bank in 1973, the Adams
    31
    Fund would have grown in value significantly.    Because Quincy
    did not do so, the Fund's value remained unchanged from 1973 to
    2008.   The judge credited this testimony and used it to
    calculate the damages owed to Woodward.
    Although the specific calculations employed by Winslow and
    adopted by the judge were inappropriate for the award of
    damages, as we discuss infra, there was no error in the process
    by which this liability theory was introduced.   The question of
    capital appreciation was indeed mentioned in Woodward's
    complaint, in the order appointing a special master, and in
    Woodward's pretrial memorandum.   Given this early introduction
    of the issue, we are not persuaded that Quincy was denied a
    meaningful opportunity to prepare to defend against this
    assertion.   Contrast Harrington-McGill v. Old Mother Hubbard Dog
    Food Co., 
    22 Mass. App. Ct. 966
    , 968 (1986).
    Even if the issue were not raised in the complaint and
    other documents, the judge may introduce a recovery theory or
    unpleaded issue at trial if there is "implied consent" of the
    parties, reflected by evidence "that the parties knew the
    evidence bearing on the unpleaded issue was in fact aimed at
    that issue and not some other issue the case involved."    Jensen
    v. Daniels, 
    57 Mass. App. Ct. 811
    , 816 (2003).   See
    Mass. R. Civ. P. 15 (b), 
    365 Mass. 761
    (1974); Harrington-
    
    McGill, 22 Mass. App. Ct. at 968
    .   As the above discussion
    32
    regarding Quincy's breach of fiduciary duty evinces, the
    question whether a trust's principal has experienced any capital
    appreciation is part of the inquiry into whether a trustee has
    engaged in prudent investments.       Accordingly, Quincy cannot
    claim that, where a breach of fiduciary duty was alleged for
    improper investment strategies, it was unaware that principal
    appreciation might be an issue or even unaware of the facts that
    might be used in support of an argument that there was no
    appreciation.
    Further, in raising the theory, the judge afforded numerous
    opportunities for Quincy to respond.      Quincy was permitted to
    depose Winslow prior to cross-examination and to retain an
    expert and prepare a response to Winslow's testimony, which it
    did.    In addition, the judge limited Winslow's testimony on this
    issue.      Thus, Quincy suffered no prejudice in the way the
    liability theory was introduced, see Cormier v. Grant, 14 Mass.
    App. Ct. 965, 965 (1982), and there was no issue of "fundamental
    fairness" in the inclusion of the theory at trial.      See 
    Jensen, 57 Mass. App. Ct. at 816
    .
    b.   Calculation of damages.   Quincy also alleges that the
    judge erred in calculating the award of damages award in three
    respects: first, by basing the award for unrealized gains on
    what the value of the Adams Fund would have been had Quincy
    followed the specific investment advice the judge found that
    33
    Quincy received in 1973; second, in deciding not to subtract
    from the unrealized gains the costs and expenses Quincy
    theoretically would have incurred had it followed the
    diversification plan; and third, in awarding prejudgment
    interest dating back to the date of each breach. 29   We agree that
    the formula used to calculate unrealized gains was
    inappropriate, but reject Quincy's other claims.
    i.   Basis for unrealized gains.   Quincy first asserts that
    the judge's finding that Quincy should have adopted a specific
    portfolio diversification plan recommended by the bank in 1973,
    and the judge's employment of this plan by way of Winslow's
    testimony to calculate the unrealized gains, was clearly
    erroneous.   We agree.
    In awarding damages, the judge concluded that the Adams
    Fund was "entitled to a return on monies it would have
    29
    Quincy also asserts that the judge's findings were
    inadequate to support the award. While we agree with Quincy
    that the judge is required to make subsidiary findings of fact
    in support of an award, see Mass. R. Civ. P. 52 (a), as amended,
    
    423 Mass. 1402
    (1996), we are not persuaded that the judge did
    not adequately do so here. See Willis v. Selectmen of Easton,
    
    405 Mass. 159
    , 161-162 (1989) (judge need only "articulate the
    essential grounds for a decision" and demonstrate that he or she
    "has dealt fully and properly with all the issues"). Further,
    to the extent Quincy challenges the judge's crediting of the
    testimony of Scott Winslow generally, and his discrediting of
    the testimony of Quincy's expert witness, we note that the judge
    is entitled to credit any properly admitted expert testimony he
    or she deems credible, and that the judge here explicitly found
    that Winslow's opinion was credible. See Delano Growers' Coop.
    Winery v. Supreme Wine Co., 
    393 Mass. 666
    , 682 (1985).
    34
    reasonably realized but for the imprudent actions of the
    Trustee."   Because the judge determined that it was imprudent
    for Quincy to ignore the bank's investment advice, and
    interpreted this advice as providing a 60-35-5 diversification
    plan, the judge calculated the return the Adams Fund would have
    realized based on this recommended portfolio and the five per
    cent rate of return the bank anticipated that such a portfolio
    would receive.    Using this information, Winslow had testified
    that, had Quincy employed this diversification plan, given the
    growth in the equity market between 1973 and 2008, the Adams
    Fund would have grown from its 1973 value of $321,932.43 to a
    value of $1,457,426 in 2008. 30   The judge therefore determined
    that the Fund suffered a loss in value of $1,135,494, or an
    average annual loss of income of $31,542, from Quincy's failure
    to act prudently and to employ the bank's portfolio
    recommendation.   Accordingly, he included this amount, plus
    prejudgment interest, in the total award.
    To the extent the damages here were based on the judge's
    finding that Quincy ignored the specific investment advice it
    received in 1973, the finding and calculation were in error. 31
    30
    Quincy takes issue with the bond indexes employed by
    Winslow in calculating these numbers. Because we conclude that
    the formula used to calculate the unrealized gains was
    inappropriate, we decline to assess whether the indexes Winslow
    used were appropriate here.
    35
    As discussed above, a trustee is not required to follow
    investment advice strictly but rather must invest prudently.
    See G. L. c. 203C, §§ 1 et seq.   Therefore, an award of damages
    cannot be based solely on what the trust's investment portfolio
    performance would have been had the trustee complied with
    certain, specific advice.   Such reliance on a potential
    investment portfolio necessarily and improperly employs the
    benefit of hindsight.   See 
    id. at §
    9.   Unfortunately, this is
    precisely the formula the trial judge employed here.
    The award must be based on more than just the unheeded
    investment advice a trustee received, and should instead
    consider the totality of the circumstances as they would have
    informed prudent investment decisions over the relevant time
    period.   See Quinton v. Galvin, 
    64 Mass. App. Ct. 792
    , 800
    (2005) (judge must reach "approximate estimate of the
    plaintiffs' damages" in considering variety of factors).    Cf.
    Bernier v. Bernier, 
    449 Mass. 774
    , 785 (2007) (valuation of
    business for purposes of divorce proceeding must not be
    31
    We disagree with Woodward's assertion that it was proper
    for the judge to rely on Winslow's testimony in calculating the
    award where Quincy did not present any contrary methodology or
    challenge Winslow's calculations. Were the methodology employed
    by the judge sound, and simply not the approach most favorable
    to Quincy, we would uphold the judge's calculation. However, we
    cannot permit a judge's ruling to stand where it is clearly
    erroneous, as we conclude it is here. See Mass. R. Civ. P.
    52 (a), as amended, 
    423 Mass. 1402
    (1996). See also Young Men's
    Christian Ass'n of Quincy v. Sandwich Water Dist., 16 Mass. App.
    Ct. 666, 672-673 (1983).
    36
    "materially at odds with the totality of the circumstances").
    Factors to consider in this case include the state of the
    relevant bond and equities markets when various investment
    decisions were made, not just at one point in time decades ago;
    the terms and limitations of the trust instrument; the specific
    needs of the income beneficiary in the short and long term; and
    any risk calculations that may have influenced the trustee's
    decisions, including subsequent advice from the bank, the Funds'
    financial advisor.    Cf. Black v. Parker Mfg. Co., 
    329 Mass. 105
    ,
    112, 116-117 (1952) (assessment of value of unique services
    involves consideration of variety of tangible and intangible
    factors).    As another factor, the judge may "take into account
    his general knowledge of economic conditions during the period
    of [the trustee's] transgressions."    
    Quinton, supra
    .   These
    factors can appropriately guide the judge's determination of
    "what asset mix a prudent fiduciary would have maintained" for
    the Adams Fund during the lengthy time frame at issue.     See
    Meyer v. Berkshire Life Ins. Co., 
    250 F. Supp. 2d 544
    , 573 (D.
    Md. 2003).
    Because the judge here considered merely one possible
    investment approach and did not account for these other factors,
    we reverse the award for unrealized gains in the portfolio and
    remand for further proceedings on this measure.    On remand, an
    assessment of what a prudent investor would have done requires
    37
    expert testimony on the minimum level of growth equities that
    would have been prudent for an income-only fund, with
    consideration of the potential shifts over the lengthy period at
    issue.     A prudent investor may well have followed the 60-35-5
    plan, or could have chosen a portfolio with a lower allocation
    to growth equities.     At a minimum, the record must be thoroughly
    developed and findings made regarding the range of prudent
    strategies, so that the award, particularly with regard to
    unrealized gains, is calculated with a fuller understanding of
    the minimum growth equities allocation in mind. 32
    ii.    Accounting for costs and expenses.   Quincy also
    asserts that the judge erred in failing to subtract from the
    damages related to the return on investment the costs and
    expenses the Adams Fund would have incurred in realizing those
    investment gains.    See G. L. c. 203C, § 8 (trustee may incur
    "costs that are appropriate and reasonable in relation to the
    assets, the purpose of the trust, and the skills of the
    trustee"). 33
    32
    Recalculating the unrealized gains on the portfolio also
    requires careful consideration of the extent of likely stock
    appreciation and the appropriate rate of return corresponding
    with the portfolio or portfolios on which the award is based.
    33
    Although the judge did not exclude any costs or expenses
    from the calculation of the unrealized return on investments, he
    did exclude from the total award expenses that he found to be
    allowable, including reasonable compensation for Quincy's
    services, despite the fact that Quincy never submitted a bill
    38
    The plaintiff bears the burden "to introduce evidence
    proving its damages to a reasonable certainty."    See Brewster
    Wallcovering Co. v. Blue Mountain Wallcoverings, Inc., 68 Mass.
    App. Ct. 582, 609 (2007).    The theory or explanation for the
    damages requested need not be the soundest one; it need only
    "provide[] a sufficiently (if minimally) rational basis" for the
    award.   
    Id. at 611.
      Cf. 
    Bernier, 449 Mass. at 785
    .   Woodward
    met this burden by presenting Winslow's testimony.      There is no
    obligation on the part of the judge to decrease potential
    damages sua sponte because of costs or expenses not admitted in
    evidence.   In the absence of contrary testimony from Quincy
    regarding what its costs were or would have been had it
    implemented the investment strategy on which the award was
    based, the judge did not err in crediting the reasonable opinion
    proffered by Woodward's expert as to what costs and expenses a
    trustee using a hypothetical portfolio would have incurred.      Cf.
    
    Bernier, supra
    .
    iii.   Award of prejudgment interest.   Finally, Quincy
    challenges the judge's award of interest on each measure of
    damages from the last date on which the damage was sustained,
    for this compensation. In fact, the judge found that Quincy
    would be due a credit against other funds owed to the Adams Fund
    of $7,018, given $157,025 in allowed expenses offset by $150,007
    in disallowed expenses. This credit was factored into the total
    award.
    39
    consistent with the judge's findings on these issues. 34   Quincy
    avers that the judge erred in including this prejudgment
    interest because, in tort actions, such interest can be awarded
    only from the date of the filing of the complaint, and not from
    the date of the breach itself, pursuant to G. L. c. 231, § 6B. 35
    We conclude that G. L. c. 231, § 6B, does not apply here, and
    affirm the awards of prejudgment interest. 36
    General Laws c. 231, § 6B, provides for the addition of
    interest to the amount of damages awarded in an action involving
    damage to property and other such tort actions, at a rate of
    twelve per cent per year from the date of commencement of the
    action.   The statute is intended "to compensate a damaged party
    34
    For example, the judge found that 1962 was the year of
    the Adams Fund's last sale of real estate below fair market
    value, and thus he included interest from the end of 1962 on the
    monies not received as a result of these below-market real
    estate sales. In addition, the judge found that the sale of a
    property referred to as "Vigoda" should have occurred in 1972
    but did not occur at all, and therefore he awarded interest from
    January 1, 1972. The judge employed two different rates of
    return in calculating the prejudgment interest: five per cent
    for the unrealized gain in the investment portfolio, and 7.54
    per cent for all other measures.
    35
    Quincy also avers that prejudgment interest is barred in
    claims against municipalities under the Massachusetts Tort
    Claims Act. See G. L. c. 258, § 2. Because, as discussed
    infra, we conclude that Quincy waived its sovereign immunity on
    these claims and therefore that the Tort Claims Act does not
    govern here, we decline to address this claim.
    36
    However, the rate of return the judge employed for the
    unrealized gain in the investment portfolio may require
    reconsideration on remand, consistent with our discussion above
    regarding the flaws in this particular analysis.
    40
    for the loss of use or the unlawful detention of money."    McEvoy
    Travel Bur., Inc. v. Norton Co., 
    408 Mass. 704
    , 717 (1990),
    quoting Conway v. Electro Switch Corp., 
    402 Mass. 385
    , 390
    (1988).   The primary goal of this statutory interest award is
    not to make the aggrieved party whole, but rather "to compensate
    for the delay in the plaintiff's obtaining his money."    See
    Bernier v. Boston Edison Co., 
    380 Mass. 372
    , 388 (1980).    To
    achieve this goal, § 6B affords a standard return that the
    aggrieved party "would have had but for the other party's
    wrongdoing," regardless of what the theory of liability or
    underlying damages calculation is.   See 
    McEvoy, supra
    .
    In contrast, "[w]hen a breach of trust occurs, the
    beneficiary of the trust is 'entitled to be put in the position
    he would have been in if no breach of fiduciary duty had been
    committed.'"   Berish v. Bornstein, 
    437 Mass. 252
    , 270 (2002),
    quoting Fine v. Cohen, 
    35 Mass. App. Ct. 610
    , 616 (1993).
    Making the beneficiary whole, particularly where the breach
    stems from imprudent investment decisions having an impact on
    the growth of the trust's assets, may require awarding interest
    beginning from the time of the breach, such that the trust's
    assets resemble what they would have but for the breach.    In
    such circumstances, the award of prejudgment interest is part
    and parcel of the award of damages itself, and is not
    compensation for the delay of litigation in the same sense as
    41
    interest awarded under G. L. c. 231, § 6B.      Accordingly, it was
    not erroneous for the judge here to find that the Adams Fund was
    entitled to a return on monies that it would have reasonably
    realized but for Quincy's imprudent actions, and to award
    prejudgment interest stemming from the last date of breach in
    order to make the Adams Fund whole. 37
    3.   Claimed bars to recovery.   We discuss briefly Quincy's
    remaining assertion that Woodward's claims should have been
    barred on the grounds of sovereign immunity; the Massachusetts
    Tort Claims Act, G. L. c. 258, §§ 1 et seq.; and laches.     We
    conclude that Woodward's claims were not so barred, and recovery
    against Quincy was proper.
    a.   Sovereign immunity and applicability of Tort Claims
    Act.    Quincy first argues that because Woodward ultimately
    brought a breach of fiduciary duty claim, which sounds in tort,
    Woodward was obligated to follow the requirements of the Tort
    Claims Act or else Quincy, as a municipality, would be
    effectively protected against the claim by sovereign immunity.
    Further, Quincy avers that Woodward failed to satisfy the Tort
    37
    There may be circumstances in which it is proper to apply
    G. L. c. 231, § 6B, to tort actions arising from the breach of a
    fiduciary duty of a trustee. See, e.g., Lattuca v. Robsham, 
    442 Mass. 205
    , 210 (2004). Where, however, the judge determines
    that an award of prejudgment interest is necessary to make the
    beneficiary whole, the additional award of interest under § 6B
    would be excessive and improper, as such an award is not
    punitive in nature. See McEvoy Travel Bur., Inc. v. Norton Co.,
    
    408 Mass. 704
    , 717 (1990).
    42
    Claims Act's presentment requirement specifically, and therefore
    its claim should have been barred.   See G. L. c. 258, § 4.
    Woodward, in contrast, asserts that its claim sounds in contract
    rather than tort, because Quincy's obligations to manage the
    Funds arose through a contractual relationship with President
    Adams, and therefore the Tort Claims Act does not place any
    conditions on its claim.   Alternatively, if its claim does sound
    in tort rather than contract, Woodward contends that Quincy's
    sovereign immunity is impliedly waived, due to Quincy's
    acceptance of the role of trustee and subsequent acts by the
    Legislature affirming this role, such that Woodward's claim
    properly survived.
    In determining whether a claim arises in tort or contract,
    we look to "the essential nature of the plaintiff's claim."
    Hendrickson v. Sears, 
    365 Mass. 83
    , 85 (1974).   When Quincy
    accepted the responsibility to manage President Adams's property
    in trust, Quincy and President Adams entered into a contract,
    see Dunphy v. Commonwealth, 
    368 Mass. 376
    , 383 (1975), of which
    Woodward is an intended third-party beneficiary and therefore is
    entitled to enforce the contract's terms.   See Miller v. Mooney,
    
    431 Mass. 57
    , 61-62 (2000); Anderson v. Fox Hill Village
    Homeowners Corp., 
    424 Mass. 365
    , 366-367 (1997), and cases
    cited.   However, although Woodward initiated this action seeking
    an accounting, a purely contractual claim, the case evolved into
    43
    an action for breach of fiduciary duty, a claim that sounds in
    tort, see Doe v. Harbor Schs., Inc., 
    446 Mass. 245
    , 254 (2006);
    Lattuca v. Robsham, 
    442 Mass. 205
    , 210, 213 (2004), and arises
    by operation of law rather than by contractual obligation.    See,
    e.g., G. L. c. 203C, §§ 1 et seq.    See also LeBlanc v. Logan
    Hilton Joint Venture, 
    463 Mass. 316
    , 328 (2012) ("Where a
    contractual relationship creates a duty of care to third
    parties, the duty rests in tort, not contract").    Accordingly,
    the present case is a tort action.    To the extent Woodward asks
    us to frame its claim as a contractual one, we decline to do so.
    See Anthony's Pier Four, Inc. v. Crandall Dry Dock Eng'rs, Inc.,
    
    396 Mass. 818
    , 823 (1986).
    As Woodward's claim sounds in tort, Quincy asserts that the
    Tort Claims Act imposes numerous conditions that Woodward failed
    to fulfil. 38   See G. L. c. 258, §§ 1 et seq.; Morrissey v. New
    England Deaconess Ass'n -- Abundant Life Communities, Inc., 
    458 Mass. 580
    , 587 (2010).    The purpose of the conditions imposed by
    the Tort Claims Act is to limit tort claims against
    municipalities in order to maintain effective government.    See
    id.; Vasys v. Metropolitan Dist. Comm'n, 
    387 Mass. 51
    , 57
    38
    Among these is the requirement that the plaintiff present
    its claim to the executive officer of the municipality within
    two years of when the cause of action arises. See G. L. c. 258,
    § 4; Richardson v. Dailey, 
    424 Mass. 258
    , 261-262 (1997). The
    parties do not dispute that Woodward did not comply with this
    presentment requirement. In addition, the Tort Claims Act
    places a $100,000 limit on damages. G. L. c. 258, § 2.
    44
    (1982).   See also Whitney v. Worcester, 
    373 Mass. 208
    , 217
    (1977).   Hence, G. L. c. 258, § 10, explicitly excludes certain
    types of claims that the Legislature clearly decided must give
    way to sovereign immunity.
    Because the Tort Claims Act is in effect a mechanism for
    both limiting and preserving sovereign immunity from certain
    tort claims, 39 see 
    Morrissey, 458 Mass. at 587
    , and cases cited,
    its restrictions do not apply where a municipality has waived
    sovereign immunity, and thereby implicitly waived the
    protections afforded by the Tort Claims Act.   Sovereign immunity
    may be waived expressly by statute or implicitly, where
    "governmental liability is necessary to effectuate the
    legislative purpose."   Todino v. Wellfleet, 
    448 Mass. 234
    , 238
    (2007).   See Woodbridge v. Worcester State Hosp., 
    384 Mass. 38
    ,
    42 (1981), and cases cited.   We conclude that Quincy's sovereign
    immunity is impliedly waived here.
    First, when Quincy agreed to serve as trustee, it assumed
    the fiduciary duties of that role, including the consequences
    for not fulfilling these duties.   The policy purposes of
    39
    Indeed, the Tort Claims Act replaced any prior common-law
    sovereign immunity doctrine with regard to tort claims and was
    designed to provide "a comprehensive and uniform regime of tort
    liability for public employers." Morrissey v. New England
    Deaconess Ass'n -- Abundant Life Communities, Inc., 
    458 Mass. 580
    , 588 (2010), quoting Lafayette Place Assocs. v. Boston
    Redev. Auth., 
    427 Mass. 509
    , 534 (1998), cert. denied, 
    525 U.S. 1177
    (1999).
    45
    sovereign immunity are not served where, as here, a municipality
    takes on a responsibility beyond its inherent or core government
    functions and therefore serves in a capacity that could just as
    easily be accomplished by a nongovernmental entity.    See
    
    Morrissey, 458 Mass. at 587
    .    See also Minton Constr. Corp. v.
    Commonwealth, 
    397 Mass. 879
    , 880 (1986) (where municipality has
    assumed certain obligations through contract, it has waived
    sovereign immunity against actions brought to enforce such
    obligations).   In essence, by choosing to accept the obligations
    of trusteeship, Quincy waived any sovereign immunity from claims
    arising from its duties as a trustee.
    A trustee, regardless of whether it is a municipality, a
    corporation, or a private individual, is accountable to courts
    for its conduct in fulfilling, or committing a breach of, the
    fiduciary duties it owes. 40   See Fox of Boylston St. Ltd.
    Partnership v. Mayor of Boston, 
    418 Mass. 816
    , 818 (1994).
    Unlike the statute at issue in 
    Woodbridge, 384 Mass. at 42
    , 44-
    45, where we determined that sovereign immunity was not waived,
    the Prudent Investor Act creates "a formal system of actionable
    guaranties," 
    id. at 42,
    and expects the same level of conduct
    from any trustee.   See G. L. c. 203C, §§ 1 et seq.   "[A] natural
    and ordinary reading" of the Prudent Investor Act indicates that
    40
    Indeed, Quincy has sought court direction regarding the
    administration of the Funds previously, and therefore has
    subjected itself to court supervision on these matters.
    46
    where a municipality accepts the obligations of serving as a
    trustee, it will be held to the same standards and subject to
    the same penalties as any other trustee.    See DeRoche v.
    Massachusetts Comm'n Against Discrimination, 
    447 Mass. 1
    , 14
    (2006).
    Several legislative acts specific to the Funds further
    signal that Quincy is liable for any breach of the trustee
    responsibilities it has assumed.   The 1827 Act appointed the
    treasurer of Quincy as treasurer of the Adams Fund and
    authorized a board of supervisors and the selectmen of Quincy to
    execute President Adams's intentions.    See St. 1827, c. 59.   It
    further required the treasurer to "render an account of his
    doings, and exhibit a fair and regular statement of the property
    in his hands."   St. 1827, c. 59, § 9.   The 1898 Act authorized
    Quincy, as trustee, to sell and convey the Adams Fund's real
    property holdings, and in effect confirmed Quincy's legal
    responsibility to administer the Fund and invest its assets.
    See St. 1898, c. 102.   In neither of these acts did the
    Legislature indicate that Quincy would be held to standards
    different from those applicable to other trustees.
    To effectuate the purposes of these acts, we must consider
    sovereign immunity to be impliedly waived.    The Legislature
    could not have intended to enable a municipality to serve as a
    trustee, by way of the Prudent Investor Act and the 1827 and
    47
    1898 Acts, and simultaneously relieve it of the fiduciary duties
    inherent in the role of a trustee.    Reading Quincy's obligations
    otherwise would frustrate the general intent of the Prudent
    Investor Act that trustees further the interests of trust
    beneficiaries, by eliminating any recourse for mismanagement,
    and would be illogical in light of the specific acts of the
    Legislature empowering Quincy to take on such fiduciary
    responsibilities on behalf of the Funds.    Accordingly, the Tort
    Claims Act cannot be read to limit tort liability where a
    municipality has agreed to serve as a trustee. 41
    b.   Laches.   Quincy also argues that the equitable doctrine
    of laches bars Woodward's claim.    We agree with Woodward, the
    trial judge, and the special master that the claim is not barred
    on this ground.
    Quincy avers that Woodward unduly delayed in bringing this
    action, and that this delay prejudiced Quincy because several of
    its key witnesses had died since the alleged breaches occurred.
    Quincy's primary contention on appeal is that the judge
    improperly required actual knowledge by Woodward of Quincy's
    41
    Because we conclude that Quincy waived the provisions of
    the Tort Claims Act, including its exceptions, we decline to
    address Quincy's claim that the Probate and Family Court lacked
    subject matter jurisdiction for the claim under G. L. c. 258,
    § 3.
    For the same reason, we need not decide whether Quincy's
    assertion that it is immune from suit on this claim under G. L.
    c. 258, § 10 (b), is a valid one.
    48
    mismanagement of the Funds in order to satisfy the laches
    standard; instead, Quincy asserts that an opportunity to
    ascertain such facts is all that is required for a laches
    defense.
    At trial, Quincy identified two occasions on which it
    asserted that Woodward had constructive knowledge of Quincy's
    failings as a trustee.   First, Quincy suggested that Woodward
    knew of Quincy's inadequacies as early as the 1960s, when the
    headmistress of Woodward communicated to Quincy's primary
    record-keeper that she was disappointed that Quincy had sold at
    least one parcel owned by the Funds for less than fair market
    value.    Second, Quincy alleged that as a result of litigation in
    the late 1980s between Woodward and Quincy regarding Quincy's
    mismanagement of the Woodward Fund, a separate trust, Woodward
    knew or should have known that Quincy was engaging in similar
    mismanagement of the Funds at issue here.    Quincy contends on
    appeal that this constructive notice should have been adequate
    to satisfy the laches standard.
    Both the special master and the trial judge rejected
    Quincy's laches claim because it had not established that
    Woodward had actual knowledge of Quincy's breach prior to its
    seeking of an accounting in 2005. 42   There is no flaw in the
    42
    The trial judge specifically rejected Quincy's assertion
    that Woodward should have known of Quincy's mismanagement as a
    49
    legal analysis employed by the trial judge.    To establish a
    laches defense, the asserting party must establish both actual
    knowledge, see 
    Lattuca, 442 Mass. at 213-214
    ; 
    Demoulas, 424 Mass. at 518-519
    ; and prejudice.    See Stuck v. Schumm, 
    290 Mass. 159
    , 166 (1935); Stewart v. Finkelstone, 
    206 Mass. 28
    , 36
    (1910).   "Constructive knowledge is insufficient," Lattuca,
    supra at 213, as is "[m]ere suspicion or mere knowledge that the
    fiduciary has acted improperly."    
    Doe, 446 Mass. at 255
    .   This
    requirement of actual knowledge "protects the beneficiary's
    legitimate expectation that the fiduciary will act with the
    utmost probity in all matters concerning the relationship."     
    Id. Contrary to
    Quincy's implication, a plaintiff is not required to
    conduct "an independent investigation" to determine if a breach
    of fiduciary duty has occurred.    Demoulas, supra at 520.
    We agree with the special master's characterization that
    although "[c]ommon sense would dictate that if Woodward knew
    [Quincy] was mismanaging the Woodward Fund . . . , [then Quincy
    was] engaging in the same practices with regards to the Adams
    Fund [,] . . . common sense and constructive notice are not the
    standards here."   As the special master and trial judge properly
    concluded, the laches standard simply was not satisfied.
    result of the Woodward Fund litigation and emphasized that the
    Funds were not parties to that litigation and therefore were not
    officially on notice of it.
    50
    Conclusion.   The further amended judgment of the Probate
    and Family Court, and the amended judgment incorporated therein,
    is affirmed as to liability.   We affirm the judge's award of
    damages in part, but remand the case to the Probate and Family
    Court for recalculation of the damages related to the unrealized
    investment gains, including prejudgment interest thereon, and
    for further proceedings consistent with this opinion.
    So ordered.