Cash Yields Rose in Q2 2026 While the Fed Sat Still — What That Means for Your Treasury Fund

If you're an income investor, cash is the quiet part of the plan: the money waiting to be deployed, the emergency sleeve. For the past year or so it has actually paid you to wait. A U.S. Treasury money market fund like Gabelli's (GUSTO, ticker GABXX) has been yielding around 3.7% while holding your money at a rock-steady $1.00 net asset value. So when this fund's Q2 2026 commentary opens by saying the quarter "marked a notable shift in the Treasury market," driven by meaningfully changed expectations for Federal Reserve policy, it's worth slowing down to understand what the shift was and whether it helps or hurts your cash.

The surprise is that the Fed itself never moved. At its June meeting the central bank held its target range at 3.50% to 3.75% — and yet short-term Treasury yields went up over the quarter. The driver was an oil shock. A Middle East conflict that erupted in the spring sent energy prices surging, and annual inflation jumped to 4.2% in May, its fastest pace in three years. Expectations swung from "the Fed keeps cutting" to pricing in at least one rate hike this year, and the central bank's own June projections turned more hawkish, with a majority of policymakers penciling in a hike. As that repricing rippled through the market, yields rose most at the short end: the 3-month Treasury closed the second quarter at 3.81%, up 14 basis points.

What the shift does to a money market fund

This is where it connects to your dollars. A money market fund's yield isn't set by the manager's cleverness — it's set by the rates the market pays on the short-dated bills the fund rolls over. GABXX invests entirely in U.S. Treasuries — 100% of the portfolio is Treasury securities. Its average maturity is 54 days, so its book constantly turns over into current market yields. When short rates rise, its income stream rises with them, even though the fund never budged from its $1.00 price. That's why its 7-day yield sits near 3.76% while expenses run just 0.08% — almost nothing is taken out before the interest reaches you.

There's a quieter advantage worth knowing for anyone in a high-tax state. Because the portfolio is entirely U.S. Treasuries, that income is exempt from state and local taxes. For a resident of a state levying a real income tax, a tax-free 3.76% is worth meaningfully more on an after-tax basis than an equivalent taxable yield — one more reason this instrument is a sensible parking place rather than just another yield-chasing fund.

The part that should keep you humble

Now the honest side. This yield is high because the moment is hawkish, not because money market funds are a high-yield asset. The same forces that lifted short rates can unwind them. Notably, Morgan Stanley expects the Fed to hold rates flat through this year as inflation cools — and the minute the central bank does cut, money market yields drift lower, because funds simply roll into the new, lower market rate. So treat that 3.76% as income on your dry powder, not as a rate you've locked in. It floats.

That floating nature is the real risk to manage. Nothing about GABXX's income engine is broken — its coverage is, structurally, as strong as U.S. Treasury paper gets, its price is pinned at $1.00, and the income is earned, not return of capital. The risk isn't in the fund. The risk is mistaking a cyclical, policy-driven yield for a permanent raise you can build a ten-year plan around.

The portfolio job it exists to do

In a diversified income machine, a Treasury money market fund has one specific role: stability and dry powder, paying you to stay liquid. It is not trying to beat a high-yield fund or a REIT, and it shouldn't be judged as if it were. For money you'll need soon, or capital waiting to be deployed into higher-yielding assets when valuations and payout safety line up, a real 3.7% that shows up as spendable cash is a genuine bonus that compounds while you wait.

So instead of watching GABXX's ticker, watch the two forces that actually set its yield: inflation and the Fed's next move. If the hawkish repricing of Q2 2026 holds, your cash keeps earning near where it is. The day inflation convincingly cools and the Fed cuts, expect that yield to drift down with the market — which is exactly why you hold this sleeve for its stability, not for a yield you can bank years out.