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Circle Internet Group (CRCL) suffered its steepest single-session decline since going public on Tuesday, plunging as much as 20% after reports surfaced that the latest draft of the Digital Asset Market Clarity Act contains language that could severely restrict stablecoin yield programs — a business model central to how Circle and its partners generate revenue.

Coinbase (COIN), Circle’s primary distribution partner for its USDC stablecoin, fell roughly 8% in sympathy. The Circle-Coinbase revenue-sharing arrangement is a key reason Coinbase is directly exposed to any regulatory changes affecting USDC economics.

What the Clarity Act Says — and Why It Matters

The latest version of the Clarity Act, shaped by a compromise crafted by Senators Angela Alsobrooks and Thom Tillis, would ban yield payments for simply holding a stablecoin. Industry insiders who got their first look at the revised draft on Monday described the language as overly narrow and unclear, creating significant uncertainty for platforms that have built yield-based products around stablecoins.

The compromise would allow rewards programs tied to a user’s stablecoin activity, but not their balance — a meaningful distinction that would effectively prohibit programs that function like interest-bearing deposit accounts.

This is not a brand-new fight. The banking lobby has pushed hard to restrict stablecoin yield because yield-bearing stablecoins would functionally compete with savings accounts — if a stablecoin issuer offered 4% on a digital dollar balance, consumers have little incentive to park money in a traditional 0.5% checking account. Congress, through the GENIUS Act signed into law last July, already prohibited stablecoin issuers from paying yield directly. The Clarity Act debate is now about whether third-party platforms — like Coinbase — can offer those returns as an intermediary.

The OCC, in its proposed rulemaking to implement the GENIUS Act, suggested that close financial ties between stablecoin issuers and crypto platforms handling their tokens would make it highly likely that any yield paid through an intermediary constitutes an attempt to evade the GENIUS Act’s prohibition. That regulatory posture adds a second layer of pressure on the Circle-Coinbase model even before the Clarity Act is finalized.

Circle’s Recent Run — and the Reversal

The selloff comes after an extraordinary run for Circle shares. The stock rallied approximately 110% from around $60 in late February to a high of roughly $130 just last week, driven by strong quarterly results, explosive USDC circulation growth, and expectations that the Federal Reserve will hold rates steady — a key input since Circle generates the bulk of its revenue from interest earned on the Treasury-backed reserves underpinning USDC.

The company has also been expanding its footprint beyond stablecoin issuance. Last year, Circle launched Arc, a specialized blockchain designed to support global payments, foreign exchange, and tokenized real-world assets using USDC as its native currency — a bid to position itself as a broader fintech infrastructure play.

The Stakes for the Broader Crypto Ecosystem

Though the crypto industry scored a major win when the GENIUS Act became the first major U.S. law to govern a segment of the crypto industry, it was designed as the first step of a two-part policy approach, with the Clarity Act meant to be the more consequential full-fledged framework for digital assets.

Stablecoin yield has become the single largest sticking point standing between the crypto industry and that comprehensive regulatory framework. Until Tuesday’s language leak, markets had been pricing in a favorable resolution. That assumption just took a significant hit.