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In Bitcoin ETF news today, 13 U.S.-listed spot Bitcoin ETFs recorded $450.4 million in net outflows on Tuesday. It marks the largest single-day loss for the funds since June 24, when Bitcoin ETFs shed $469 million during a broader technology-stock sell-off, and it comes just one trading day after the group had pulled in $159.9 million in fresh inflows.
The reversal is stark, but a single red session does not yet constitute a confirmed institutional retreat from spot Bitcoin exposure; it reads more as a concentrated risk-off reversal than a structural exit.
JUST IN: BlackRock and other ETF issuers sell $450.33 million worth of $BTC. pic.twitter.com/BTYhk32kEB
— Whale Insider (@WhaleInsider) September 16, 2026
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Fidelity and BlackRock Drove the Day’s BTC ETF Withdrawals
Fidelity’s FBTC led the redemptions with $214.8 million pulled from the fund, the single largest contributor to Tuesday’s total. BlackRock’s IBIT followed with $161.7 million in outflows, meaning the two largest issuers accounted for the overwhelming majority of the day’s net selling on their own.
Grayscale’s Bitcoin Trust ETF (GBTC) lost $44.1 million, ARK 21Shares Bitcoin ETF (ARKB) shed $17.4 million, and Bitwise Bitcoin ETF (BITB) recorded $12.4 million in outflows. Readers tracking the broader withdrawal pattern can find additional detail in ICOBench’s earlier coverage of recent U.S. spot Bitcoin ETF outflow sessions.
The scale of the reversal is easier to read against recent momentum. U.S. spot Bitcoin ETFs reportedly attracted $730.9 million on September 3, with IBIT alone accounting for roughly $454 million, or about 62% of that day’s total, and FBTC adding close to $74 million.
Tuesday’s $450.4 million exit erases a meaningful chunk of that momentum in a single session, and it underscores how much sway BlackRock’s IBIT and Fidelity’s fund carry over the sector’s aggregate numbers. Background on IBIT’s structural role among institutional investors is available in ICOBench’s prior look at BlackRock’s Bitcoin ETF and its market position.
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Why is Bitcoin Falling as Crypto Legislation Stalls?
Bitcoin was trading at approximately $75,800 at the time of the report, down 2.5% over the previous 24 hours. The decline landed the same day a major crypto bill, the CLARITY Act, failed to advance in the U.S. Senate. A policy setback tied directly to the day’s risk-off tone across crypto markets.
What’s clear from Tuesday’s data is that ETF outflows can swing by hundreds of millions of dollars within 24 hours when Fidelity and BlackRock move in the same direction. A reminder that even as institutional investors have poured billions into these products since their 2024 launch, the flows remain highly reactive to both price action and Washington’s legislative calendar.
Whether this proves a one-day repositioning or the start of a longer pullback will depend on whether FBTC and IBIT resume net buying in the sessions ahead.
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