The Uniform Prudent Investor Act, adopted in some form by every state, is the legal framework that governs how you invest trust assets. If there is one law every trustee needs to understand, this is it.
The Act replaced the old "prudent man" rule, which judged each investment in isolation. Under the old rule, if you invested trust funds in a stock that lost 40% of its value, you could be held liable for that loss, even if the rest of the portfolio gained 60%. The modern rule evaluates the entire portfolio as a whole. A single losing investment is not a breach if the overall strategy was sound and properly diversified.
This shift reflects how investing actually works. No reasonable person expects every single investment to be a winner. What the law demands is a thoughtful overall strategy that balances risk and return based on the trust's specific circumstances.
Before you invest a single dollar, you need an investment policy statement. This written document defines the trust's investment objectives, risk tolerance, asset allocation targets, and the benchmarks you will use to evaluate performance. It is your roadmap, and it protects you by showing that your decisions followed a deliberate strategy rather than impulse or guesswork.
Under the Prudent Investor Act, diversification is a duty, not a suggestion. A trustee must diversify trust investments unless there is a specific reason not to, and that reason must be documented.
Diversification means spreading investments across different asset classes (stocks, bonds, real estate, cash), different sectors, different geographies, and different risk levels. The goal is to reduce the impact of any single investment's poor performance on the overall portfolio. If one stock drops 50%, a well-diversified portfolio absorbs that loss without catastrophic damage.
The only exception is when the trust document specifically directs the trustee to hold a concentrated position. Some trusts instruct the trustee to retain shares of a family business or a specific piece of real estate. In those cases, the grantor has accepted the risk of concentration and relieved you of the duty to diversify that particular asset. But document the directive and your compliance with it.
"Take $1 million invested at a 7% annual return. After 50 years, that grows to $29.5 million. After 100 years, $868 million. The math of long-term investing inside a trust is staggering, but only if the investments are managed with discipline and patience."
The modern approach to trust investing focuses on total return, which combines income (dividends, interest, rent) and capital appreciation (growth in the value of the underlying assets). This replaces the older approach of investing solely for income, which forced trustees to chase high-yield investments at the expense of portfolio growth.
Many states now allow trustees to convert a trust to a unitrust format, where the income beneficiary receives a fixed percentage (typically 3% to 5%) of the total trust value each year, regardless of how that return was generated. This approach frees the trustee to build the best portfolio possible without being constrained by artificial distinctions between "income" and "principal."
Your investment responsibility does not end once the portfolio is constructed. You must review the portfolio regularly, at least quarterly for most trusts, and rebalance when asset allocations drift beyond the targets set in your investment policy statement.
Rebalancing is the process of selling assets that have grown beyond their target allocation and buying assets that have fallen below it. This enforces the discipline of selling high and buying low, which runs counter to human instinct but is one of the most effective long-term investment strategies.
Document every review. Note what you looked at, what changes you made (or chose not to make), and why. If you delegate investment management to a professional, review their performance against agreed-upon benchmarks at least annually and keep written records of those reviews.
This lesson is adapted from The Legacy Blueprint by Rico Williams. Get the full book with all chapters, case studies, and action plans.
Get the Book on Amazon