In Brief
- On Tuesday, U.S. spot Bitcoin ETFs recorded a loss of $450.4 million, marking their largest single-day withdrawal since June 24.
- The Senate narrowly voted 49 to 50 against advancing the Clarity Act, a proposed legislation aimed at establishing a regulatory framework for the crypto market, which required 60 votes to proceed.
- Ethereum ETFs suffered an additional outflow of $142.3 million on the same day, while XRP funds remained unchanged.
On Tuesday, U.S. spot Bitcoin ETFs experienced a significant outflow of $450.4 million, the highest single-day withdrawal noted since June 24, as reported by Decrypt's Bitcoin ETF tracker.
Exchange-traded funds (ETFs) allow average investors to gain exposure to assets like Bitcoin through standard brokerage accounts, eliminating the need to manage a crypto wallet. Since their debut two years ago, they have gained immense popularity and serve as a barometer for market sentiment with daily inflows and outflows.
Myriad: Predict Bitcoin's next move. Click here to make your prediction.Leading the withdrawals, Fidelity's FBTC saw $214.8 million exit, while BlackRock's IBIT lost $161.7 million, Grayscale's GBTC dropped $44.1 million, and other funds from ARK 21Shares and Bitwise faced smaller outflows.
Bitcoin ETF data. Image: DecryptMeanwhile, Ethereum ETFs lost an additional $142.3 million that same day, and XRP funds, which are less established, remained stable after gaining $11.3 million the previous day.
Ethereum ETF data. Image: DecryptThe total outflows across these three asset categories reached nearly $593 million in just one session, marking the steepest one-day decline for crypto ETFs since June, when Bitcoin funds recorded their worst month ever.
This downturn was not triggered by a cyberattack or market crash, but rather by political developments in Congress.
Significance of the Senate Vote
On Tuesday, the Senate did not achieve the necessary votes to invoke cloture, which is required to move a bill to formal debate, needing 60 votes out of 100 for advancement, on the Digital Asset Market Clarity Act.
The vote was 49 to 50 against the bill. Elizabeth Warren, the ranking Democrat on the Senate Banking Committee, expressed her opposition during the debate, cautioning that the legislation could lead to a "crypto-fueled economic crash."
The Clarity Act aimed to establish a comprehensive regulatory framework for crypto, delineating oversight responsibilities between the Securities and Exchange Commission and the Commodity Futures Trading Commission, thereby legalizing most crypto trading in the U.S.
Senator Cynthia Lummis (R-WY), a key negotiator for the bill, characterized the failure as a likely termination of its prospects, stating, "It's over," shortly before the vote. Following the confirmation of the negative outcome, she criticized her Democratic colleagues, declaring them "anti-American" in a post on X.
Today, Senate Democrats demonstrated that they were never genuinely committed to safeguarding consumers or maintaining American leadership. I engaged in good faith negotiations with them, while they resorted to political games.
For more than a year, they made demands…
— Senator Cynthia Lummis (@SenLummis) September 15, 2026
Regulatory clarity is essential for institutional investors, such as pension funds and banks, to treat Bitcoin as a legitimate financial product rather than a murky legal asset. The outflows on Tuesday may reflect this uncertainty manifesting in actual financial withdrawals. Additionally, the upcoming decision from the Federal Reserve, anticipated to be the first interest rate hike in three years, could also significantly influence market dynamics, possibly even more than the Clarity Act's fate.
It is also important to note that Congress may not have completely abandoned the Clarity Act. There are approximately 22 working days left on the Senate agenda before midterm campaigning takes over the fall session. The Digital Chamber, a crypto industry group, referred to Tuesday's outcome as a "setback" rather than a definitive loss.
Unless there is a last-minute revival, the rulemaking process by the SEC and CFTC—an option highlighted by Treasury Secretary Scott Bessent—will likely serve as the nearest guide for U.S. crypto markets in the remainder of 2026.