The "Protecting Prudent Investment of Retirement Savings Act" significantly amends the Employee Retirement Income Security Act of 1974 (ERISA) to reinforce fiduciaries' duties to prioritize participants' financial interests. It introduces new requirements across four key areas concerning retirement plan management, aiming to increase retirement earnings and protect investor interests.

One division mandates that fiduciaries must base investment decisions solely on pecuniary factors, which are those expected to materially affect an investment's risk or return. Fiduciaries are prohibited from sacrificing investment return or taking on additional risk to promote non-pecuniary benefits, though non-pecuniary factors may be used as a tie-breaker if pecuniary factors are insufficient and properly documented. Another section requires fiduciaries to select and monitor plan service providers without regard to race, color, religion, sex, or national origin.

Furthermore, the bill establishes clear guidelines for the exercise of shareholder rights, including proxy voting. Fiduciaries must act prudently and solely in the economic interest of participants and beneficiaries, ensuring that non-pecuniary objectives do not subordinate these financial interests. It also allows for the adoption of safe harbor proxy voting policies to manage resources efficiently and requires monitoring of investment managers and proxy advisory firms.

Finally, the legislation introduces new disclosure requirements for individual account plans offering brokerage windows. Participants must receive and acknowledge a notice each time they use these windows, informing them that such investments are not prudently selected or monitored by plan fiduciaries and may carry higher risks or lower returns than designated investment alternatives. This notice must also include a hypothetical illustration of projected retirement balances to highlight potential impacts.