U.S. Spot Bitcoin ETFs See $288.7M Net Outflows as Senate Vote Stalls CLARITY Act

U.S.-listed spot Bitcoin exchange-traded funds posted $288.7 million in net outflows on September 15, flipping from $159.9 million of net inflows the previous day, according to Farside data. Fidelity's FBTC accounted for the largest share of redemptions at $214.8 million. Grayscale's GBTC saw $44.1 million in outflows, followed by ARK Invest and 21Shares' ARKB at $17.4 million and Bitwise's BITB at $12.4 million. The pullback came as the U.S. Senate failed to clear a procedural step for the Digital Asset Market CLARITY Act. The measure drew 50 votes in favor and 49 against, falling short of the 60 votes needed to advance. On September 14, BlackRock's IBIT logged $134.3 million of inflows and FBTC added $53.3 million before reversing course a day later. Farside did not publish a finalized IBIT figure for September 15. While notable, the latest wave of selling was not without precedent. Farside data show U.S. spot Bitcoin ETFs recorded roughly $469 million in net outflows on June 24, during a sharp Bitcoin drawdown. The September 15 redemptions also coincided with renewed weakness in Bitcoin's price, adding to pressure from falling prices, ETF selling, and fresh uncertainty around U.S. crypto legislation. The stalled Senate vote leaves the U.S. digital-asset sector without a clear timeline for a comprehensive market-structure framework. For investors, the episode underscores how tightly regulatory headlines are now linked to crypto-market sentiment, with spot Bitcoin ETFs serving as a direct on-ramp and off-ramp for institutional positioning and daily flows acting as a key barometer of capital allocation. The policy fight extends beyond Bitcoin ETFs. The CLARITY debate has highlighted competing interests over stablecoin rewards, bank deposits, regulatory jurisdiction, and ethics, signaling that the next phase of U.S. crypto legislation will likely address not only asset definitions but also how digital-dollar infrastructure fits alongside banks and existing financial markets. For now, the Senate's 50–49 vote leaves that framework unresolved as Bitcoin and the ETF market absorb another setback in Washington.