BlackRock’s SGOV ETF approaches $100B mark, doubling its nearest competitor

BlackRock’s iShares 0-3 Month Treasury Bond ETF, known by its ticker SGOV, has swelled to roughly $98.5 billion in assets as of mid-July 2026. That puts it within spitting distance of becoming the first ultra-short bond ETF to crack the $100 billion threshold.

To put that number in perspective, SGOV is now more than double the size of its closest rival, the SPDR Bloomberg 1-3 Month T-Bill ETF (BIL), which sits at approximately $46.8 billion in assets under management. What started as a modest cash-parking vehicle launched in May 2020 has quietly become one of the most important funds in fixed income.

A fund that eats competitors for breakfast

SGOV has attracted $28.9 billion in net inflows just in the year to date through mid-July 2026. That’s not a typo. Nearly $29 billion in fresh capital has flowed into a single fund that essentially buys the shortest-dated US government debt available.

The fund now ranks as the third-largest fixed-income ETF in the entire US market. Only the Vanguard Total Bond Market ETF (BND) and the iShares Core US Aggregate Bond ETF (AGG) sit above it. SGOV does one thing: it holds Treasury bills maturing in zero to three months, tracking the ICE 0-3 Month US Treasury Securities Index.

SGOV currently offers a 30-day SEC yield of around 3.6%, charges an expense ratio of just 0.09%, and carries virtually no interest-rate risk.

Compare that expense ratio to BIL’s 0.14%. Five basis points might sound trivial, but at the scale these funds operate, it translates to meaningful savings. On $98.5 billion in assets, that difference amounts to nearly $50 million annually that stays in investors’ pockets rather than going to fund managers.

Why cash is king again

The fund essentially competes with money market funds, but with some structural advantages. ETFs trade on exchanges throughout the day, offering immediate liquidity that traditional money market vehicles can’t always match. There’s no minimum investment, no redemption gates, and no liquidity fees of the kind that spooked money market fund investors during past periods of stress.

SGOV’s launch timing in May 2020 was almost accidentally perfect. It arrived just as the Federal Reserve was beginning what would eventually become an aggressive rate-hiking cycle. As short-term rates climbed, so did the fund’s yield, and investors followed the money.

What this means for investors

There’s a risk worth watching. SGOV’s yield is directly tied to short-term interest rates. If the Federal Reserve cuts rates significantly, that 3.6% yield compresses, and the fund’s primary selling point weakens. Investors who have parked capital in SGOV as a semi-permanent allocation rather than a temporary holding pen could find themselves earning substantially less without having repositioned into longer-duration assets that might benefit from rate cuts.

The fee differential between SGOV’s 0.09% expense ratio and the average money market fund fee creates a persistent gravitational pull toward the ETF structure.