They deliver steady returns, daily liquidity, and principal protection, all of which are appealing in a volatile market. But beneath that calm surface lies a subtle risk that even seasoned financial professionals can overlook: the hidden cost of subsidization.

When fiduciaries fail to scrutinize contract terms, market-to-book ratio and the financial strength of insurers or wrap providers, new participant contributions can unintentionally subsidize existing investors. Over time, this quiet imbalance can undermine fairness, fiduciary prudence and ultimately, participant outcomes.

Understanding how subsidization happens

Stable value investments come in three primary structures: general account, separate account and CIT (collective investment trust) wrap. Each offers a unique balance of guarantees, transparency and governance requirements.

But regardless of structure, every stable value fund relies on a relationship between two key measures: book value (the participant’s stated balance including credited interest) and market value (the actual worth of the underlying portfolio).

When the market-to-book ratio falls below 100%, the market value of assets is less than the participant balances. In that scenario, any new money entering the fund effectively subsidizes existing investors, since incoming contributions are invested at an inflated book value. This “hidden cost” is rarely visible to participants yet it poses clear fiduciary implications.

A real-world example

Consider a retirement plan committee evaluating a new CIT-based stable value fund. The credited rate appears attractive and the historical returns seem steady. But upon deeper review, the market-to-book ratio is just 92%, and the underlying bond portfolio shows signs of credit deterioration.

Had the fiduciaries moved forward, every new dollar invested would have been used to prop up the shortfall for current investors — meaning new participants would be subsidizing the losses of others. Instead, the committee documented the red flag and continued its search for a healthier alternative.

This example underscores a core fiduciary principle: prudence isn’t about choosing the most popular or highest-yielding product; it’s about understanding the structure beneath the surface and protecting all participants equally.

Fiduciary implications under ERISA

The Employee Retirement Income Security Act (ERISA) holds fiduciaries to the prudent man standard of care. That means every decision must be made with the same skill, diligence and caution that a knowledgeable expert would apply.

In stable value products, risks like subsidization are not always visible in quarterly returns. Fiduciaries should review:

• Market-to-book ratios to identify potential imbalances.
• Crediting rate trends for signs of stress or wrap provider pressure.
• Termination provisions, which may force payouts at market value during plan exits.
• Transfer and withdrawal rules, which can restrict access or reclassify withdrawals.

Documenting these reviews and discussions in committee minutes is essential to demonstrate a prudent process.

How subsidization risk varies by product type

Subsidization risk isn’t uniform, and varies by product type:

• General account stable value: The insurer’s overall solvency is critical. Limited transparency can mask the degree to which returns are smoothed or cross-subsidized across clients.
• Separate account: Offers more insulation and disclosure but still relies on the insurer’s claims-paying ability.
• CIT wrap products: Provide participant-level ownership and transparency but can expose plans to market-to-book volatility, wrap provider behavior and cross-plan risk when commingled with other plans.

Commingled accounts, while efficient, can amplify the risk. One plan’s large withdrawal or performance issue can ripple through to others — another subtle form of subsidization that fiduciaries must evaluate carefully.

Transparency over complacency

Stable value funds remain a cornerstone of retirement plans because they provide dependable income and peace of mind. But fiduciaries must remember that “stable” does not mean “risk-free.”

When financial professionals educate plan sponsors about the hidden cost of subsidization, they elevate the conversation from product selection to participant protection, which is the ultimate goal of a prudent fiduciary.

Choosing a stable value solution supported by strong regulatory oversight and transparent capital management, such as those offered by Securian Financial, can help fiduciaries align with the principles outlined in this paper.

Securian Financial’s stable value offerings are designed within a disciplined risk and capital framework, backed by robust monitoring standards and state-based regulatory supervision. This structure gives plan sponsors confidence that the guarantees underlying participant accounts are supported by sound financial strength and a commitment to prudent oversight. Learn more about Securian’s stable value solutions.