A Better Test of Bond-Fund Resilience

For bank-loan and high-yield mutual funds, the central question is not whether cash is good. It is whether the fund can meet its redemption promise without turning a difficult portfolio into a costly forced-sale problem. This final synthesis brings together the Federal Reserve’s measures and stress evidence with the SEC’s controls, governance, and reporting framework. The result is a conditional test of resilience: what the buffer covers, what remains outside it, what kind of shock is occurring, and how much of that condition can actually be observed.

The direct answer is straightforward. More cash can make a fund better prepared because it can meet some withdrawals and buy time before less-liquid assets must be sold. But it does not automatically make the fund safer in a run. Cash does not change the market depth of the bank loans or high-yield bonds that remain in the portfolio. It does not stop investors from redeeming. It may be held precisely because the portfolio is difficult to sell. And its adequacy can change when a market-wide shock causes many funds to seek liquidity at once.

That is not an argument against cash. It is an argument against using cash as a complete definition of liquidity.

The Answer: Capacity Is Not Resilience

A fund’s liquid capacity and its residual portfolio liquidity are different dimensions of the same funding problem. Liquid capacity consists of the assets that may be used before the fund has to sell more difficult holdings. Residual portfolio liquidity concerns how quickly and at what price the rest of the portfolio can be converted into cash under current conditions. The first dimension can provide time. The second determines what happens when that time is insufficient.

The Federal Reserve’s liquidity ratio approximates the first dimension by dividing cash and cash equivalents, U.S. Treasury bills, and short-term investment vehicles by total net assets. A larger ratio can mean more immediately usable capacity. It does not say how large the next redemption wave will be, how persistent it will be, or whether the assets outside the numerator can be sold without significantly changing their market value.

The Federal Reserve’s Level 3 illiquidity ratio looks at a different part of the second dimension. It measures the share of net assets in assets valued using significant unobservable inputs and therefore typically difficult to value. That is a meaningful warning about extreme valuation difficulty, but it is not a complete map of saleability. Market depth is not directly observed. A fund with few Level 3 assets may still have substantial Level 2 holdings, concentrated positions, or securities that become expensive to sell when buyers retreat.

The distinction can be expressed as a counterexample to a one-number judgment. Suppose a bank-loan fund’s liquid ratio remains stable while its Level 3 exposure rises from post-pandemic lows. The fund has not lost the capacity represented by the ratio, but the portfolio outside that capacity has become less reassuring. The Federal Reserve describes this pattern for the median BL fund: after the liquidity ratio settled at about 4.5 percent from 2024 onward, the median illiquidity ratio moved toward pandemic-era levels again from 2025. The source’s conclusion is an increase in liquidity-transformation risk on balance, not a declaration that a specific fund crossed a safety line.

The high-yield comparison shows why even that interpretation cannot be exported mechanically. The median HY liquidity ratio remained about 4 percent from 2020 onward, while the median illiquidity ratio was relatively flat and its percentile range narrowed. The Federal Reserve says liquidity-transformation activity appears to have declined on balance for HY funds. That is a different aggregate pattern from the bank-loan result, not proof that every high-yield fund is safe or that a four-percent ratio has a fixed meaning in every market.

The sector context matters because a liquid percentage is embedded in an asset structure. Bank-loan mutual funds primarily hold bank loans; high-yield funds primarily hold non-investment-grade corporate bonds. Between the fourth quarter of 2019 and the fourth quarter of 2025, BL-fund net assets declined by $19 billion, or 21 percent, to $71 billion, while HY-fund assets rose 13 percent to $263 billion. Neither sector total ranks one sector above the other. They show that the same percentage is being applied to different portfolios and changing pools of assets.

The Federal Reserve’s stress comparisons add the behavioral dimension.