2023 Colorado Revised Statutes › Title 15 - PROBATE, TRUSTS, AND FIDUCIARIES (§§ 15-1-101 — 15-24-403) › FIDUCIARY (§§ 15-1-101 — 15-1.5-122) › Article 1.1 - UNIFORM PRUDENT INVESTOR ACT (§§ 15-1.1-101 — 15-1.1-115) › Section 15-1.1-101 - Prudent investor rule

(a)
Except as otherwise provided in subsection (b) of this section, a trustee who invests and manages trust assets owes a duty to the beneficiaries of the trust to comply with the prudent investor rule set forth in this article.
(b)
The prudent investor rule, a default rule, may be expanded, restricted, eliminated, or otherwise altered by the provisions of a trust. A trustee is not liable to a beneficiary to the extent that the trustee acted in reasonable reliance on the provisions of the trust.
L. 95: Entire article added, p. 309, § 1, effective July 1.
OFFICIAL COMMENT
This section imposes the obligation of prudence in the conduct of investment functions and identifies further sections of the Act that specify the attributes of prudent conduct.
Origins.
The prudence standard for trust investing traces back to Harvard College v. Amory, 26 Mass. (9 Pick.) 446 (1830). Trustees should "observe how men of prudence, discretion and intelligence manage their own affairs, not in regard to speculation, but in regard to the permanent disposition of their funds, considering the probable income, as well as the probable safety of the capital to be invested." Id. at 461.
Prior legislation.
The Model Prudent Man Rule Statute (1942), sponsored by the American Bankers Association, undertook to codify the language of the Amory case. See Mayo A. Shattuck, The Development of the Prudent Man Rule for Fiduciary Investment in the United States in the Twentieth Century, 12 Ohio State L.J. 491, at 501 (1951); for the text of the model act, which inspired many state statutes, see id. at 508-09. Another prominent codification of the Amory standard is Uniform Probate Code § 7-302 (1969), which provides that "the trustee shall observe the standards in dealing with the trust assets that would be observed by a prudent man dealing with the property of another . . . ."
Congress has imposed a comparable prudence standard for the administration of pension and employee benefit trusts in the Employee Retirement Income Security Act (ERISA), enacted in 1974. ERISA § 404(a)(1)(B),
29 U.S.C. § 1104(a)
, provides that "a fiduciary shall discharge his duties with respect to a plan solely in the interest of the participants and beneficiaries and . . . with the care, skill, prudence, and diligence under the circumstances then prevailing that a prudent man acting in a like capacity and familiar with such matters would use in the conduct of an enterprise of like character and with like aims . . . ."
Prior Restatement.
The Restatement of Trusts 2d (1959) also tracked the language of the Amory case: "In making investments of trust funds the trustee is under a duty to the beneficiary . . . to make such investments and only such investments as a prudent man would make of his own property having in view the preservation of the estate and the amount and regularity of the income to be derived . . . ." Restatement of Trusts 2d § 227 (1959).
Objective standard.
The concept of prudence in the judicial opinions and legislation is essentially relational or comparative. It resembles in this respect the "reasonable person" rule of tort law. A prudent trustee behaves as other trustees similarly situated would behave. The standard is, therefore, objective rather than subjective. Sections 2 through 9 of this Act identify the main factors that bear on prudent investment behavior.
Variation.
Almost all of the rules of trust law are default rules, that is, rules that the settlor may alter or abrogate. Subsection (b) carries forward this traditional attribute of trust law. Traditional trust law also allows the beneficiaries of the trust to excuse its performance, when they are all capable and not misinformed. Restatement of Trusts 2d § 216 (1959).