Retirement plan fiduciaries face growing pressure to evaluate investment performance, but not all funds are held to the same standards. Here's what makes SEC mutual fund reporting uniquely reliable-and why it matters for your 401(k)
When it comes to evaluating retirement plan investments, not all performance numbers are created equal. Many fiduciaries and plan sponsors rely on headline returns, but the underlying standards used to calculate those figures can vary dramatically depending on the type of investment vehicle. According to reporting by Broadcast Retirement Network, SEC-registered mutual funds stand out for their strict performance measurement rules, which are enforced by federal regulators and designed to ensure comparability and transparency.
Unlike collective investment trusts (CITs), private equity funds, or insurance products-many of which are regulated at the state level or operate under looser standards-SEC mutual funds must adhere to a uniform set of accounting and reporting requirements. These rules prohibit the use of illiquid or hard-to-value assets, such as private equity, private debt, annuities, or crypto, unless those assets can be independently valued and audited. As a result, investors and fiduciaries can have a higher degree of confidence that reported returns reflect actual, realized performance rather than estimates or marketing-driven projections.
Other performance standards exist, such as the CFA Institute's Global Investment Performance Standards (GIPS), but these are voluntary and lack the enforcement power of the SEC. While GIPS can provide useful guidelines for traditional stock and bond portfolios, they struggle to address the complexities and opacity of alternative assets. Some private equity firms have developed their own standards, like ILPA, but compliance is inconsistent and enforcement is minimal. This patchwork of standards creates significant challenges for plan sponsors trying to compare investments on a level playing field.
Conflicts of Interest and Regulatory Gaps
The shift away from SEC mutual funds toward CITs and alternative products is often driven by industry incentives. Many consulting firms and retirement plan advisors now have financial ties to private equity or alternative asset managers, creating potential conflicts of interest. These products may offer higher fees for providers, but they also introduce greater risk for plan fiduciaries, who are ultimately responsible for monitoring investment performance and protecting participant assets.
State-regulated CITs, in particular, have become a popular way to include alternative assets in retirement plans without meeting the SEC's strict standards. This can make it easier for providers to obscure fees or present performance in a more favorable light. For plan sponsors, the lack of consistent, enforceable standards means that extra due diligence is required whenever considering non-SEC products. The risk of litigation is also higher, especially for larger plans, as courts increasingly scrutinize the transparency and comparability of reported returns.
Recent years have seen a surge in lawsuits targeting retirement plans over fees and performance, but most litigation focuses on the largest 1% of plans. According to Department of Labor data, there are roughly 700,000 401(k) plans in the U.S., but only a small fraction have faced legal challenges. For the vast majority of plans, regulatory oversight remains limited, and many sponsors may not fully understand the risks associated with moving away from SEC-registered mutual funds.
Practical Implications for Plan Sponsors
For fiduciaries and plan advisors, the practical takeaway is clear: SEC mutual funds offer a level of transparency and comparability that is difficult to match elsewhere in the retirement investment landscape. When evaluating non-SEC products, sponsors should apply significantly greater scrutiny, including independent performance verification and a careful review of underlying assets and fee structures. The burden of proof is higher, and the potential for conflicts of interest or misleading performance reporting is real.
One recent example of the broader consequences of shifting standards can be seen in the way large financial institutions adapt to regulatory and market changes. As Morgan Stanley's response to Schwab's evolving business mix demonstrates, even established players must navigate the tension between regulatory requirements, investor expectations, and the pursuit of higher-margin products. For retirement plan sponsors, the lesson is to prioritize products with robust, enforceable standards-especially when participant outcomes are at stake.
According to the Investment Company Institute, as of year-end 2025, U.S. mutual funds held over $27 trillion in assets, with more than half of 401(k) plan assets invested in mutual funds. The average expense ratio for equity mutual funds in 2025 was 0.39%, down from 0.44% in 2023, reflecting ongoing fee compression and competitive pressure. In contrast, fees for alternative investments and CITs can be significantly higher and less transparent, making it harder for plan sponsors to assess true net performance.
Ultimately, the decision to include non-SEC products in a retirement plan should be made with a full understanding of the trade-offs involved. While alternative assets may offer diversification or the potential for higher returns, they also come with increased complexity, less reliable performance data, and greater fiduciary risk. For most plan sponsors, sticking with SEC-registered mutual funds remains the most defensible choice from both a regulatory and participant-outcome perspective.
Performance measurement in retirement plans is more than a technical detail-it's a core fiduciary responsibility. SEC mutual funds are subject to rigorous, enforceable standards that help ensure reported returns are real, comparable, and transparent. As the retirement industry continues to evolve, plan sponsors and advisors must weigh the benefits of innovation against the risks of reduced oversight and increased complexity. In a landscape where not all performance numbers can be trusted equally, the standards behind the numbers matter more than ever.
Understanding the difference between SEC-registered mutual funds and other investment vehicles is critical for anyone involved in retirement plan oversight. SEC mutual funds are required to publish standardized performance data, disclose all fees, and undergo regular audits, making them uniquely transparent. In contrast, CITs and alternative assets may lack these protections, leaving plan sponsors with more work to verify performance and manage risk. As regulatory scrutiny and litigation risk increase, the ability to demonstrate prudent selection and monitoring of plan investments will only become more important for fiduciaries.
