IQMM: The $22.7 Billion ETF You've Never Heard Of

When ProShares listed IQMM on February 17, the fund's $17 billion first-day trading volume made it one of the largest ETF debuts ever recorded. Less than three months later, the fund holds $22.7 billion and sits alone atop a category it essentially invented.

The explanation has little to do with yield-hungry retail investors or advisors looking for a better cash vehicle. IQMM exists because of the GENIUS Act — the federal stablecoin law signed in July 2025 — and its assets are almost certainly dominated by one or more stablecoin issuers parking their reserves.

The GENIUS Act imposed the first comprehensive federal requirements on stablecoin issuers operating in the United States. The law mandates that every payment stablecoin in circulation be backed 1:1 by qualifying reserve assets. Those assets are limited to physical currency, U.S. Treasury bills, repurchase agreements, and a narrow set of regulator-approved low-risk instruments.

Issuers must segregate reserves from their own operating funds, submit to monthly public disclosures of reserve composition, and undergo monthly examination by a registered public accounting firm. Rehypothecation — using reserve assets as collateral for other purposes — is explicitly prohibited.

The FDIC approved a notice of proposed rulemaking to implement the law on April 7, with a comment period running through June 9.

Before IQMM, stablecoin issuers held reserves in separate managed accounts, money-market mutual funds, or direct Treasury purchases. ProShares saw an opening: package GENIUS-compliant assets into an ETF wrapper and offer stablecoin issuers a single vehicle that satisfies the law's requirements while providing intraday liquidity and weekly distributions.

The fund invests exclusively in cash and U.S. Treasuries with maturities of 93 days or less, targeting a weighted average maturity of 60 days or under. It charges a 0.15% net expense ratio (waived from the stated 0.20% through January 2027) and anchors its NAV around $100 per share.

The stablecoin market now exceeds $300 billion in circulation, led by Tether's USDT and Circle's USDC. Circle alone manages nearly $64 billion in USDC reserve assets through a BlackRock-managed fund. The $17 billion debut immediately sparked speculation that a major issuer — most likely Circle, potentially Tether's newly launched USAT, or Ripple — had begun shifting reserves into the ETF.

IQMM is not the only short-duration Treasury ETF on the market, but it occupies a distinct regulatory niche. The iShares 0-3 Month Treasury Bond ETF (SGOV) manages roughly $75 billion at a 0.09% expense ratio, while Vanguard's newer 0-3 Month Treasury Bill ETF (VBIL) charges just 0.06%. Both are cheaper, and SGOV is far larger.

The difference is structural. Neither SGOV nor VBIL operates under the regulatory framework required by the GENIUS Act. IQMM was specifically engineered to qualify as a compliant reserve vehicle — a distinction that matters to stablecoin issuers facing federal scrutiny but is largely irrelevant to a financial advisor building a cash sleeve.

For traditional investors, IQMM offers a competitive 3.52% SEC yield with virtually zero credit or duration risk, but the fee premium over SGOV and VBIL is hard to justify unless the GENIUS Act compliance matters to you. It doesn't for most advisors and retail investors.

IQMM is a case study in regulation creating demand. The GENIUS Act didn't just set rules for stablecoins — it created a multibillion-dollar addressable market for asset managers willing to build compliant products. ProShares moved first and captured the bulk of early flows.

The question now is whether competitors follow. BlackRock, Vanguard, and State Street all have the infrastructure to launch GENIUS-compliant money-market ETFs, and the fee economics are straightforward at scale. If the stablecoin market continues to grow — and most projections suggest it will — the reserves backing those tokens will need to sit somewhere.

For ETF.com readers, IQMM is worth watching not for what it does — holding T-Bills is not complicated — but for what it represents: a new category of ETF demand driven entirely by regulatory architecture rather than traditional portfolio construction. The $22.7 billion sitting in IQMM today didn't come from 401(k) rollovers or model portfolios. It came from the collision of crypto regulation and the ETF wrapper's structural advantages.

That collision is just getting started.

This article was generated with the assistance of artificial intelligence and reviewed by ETF.com staff.

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