Monday’s crypto sell-off triggered the largest monthly outflows from U.S. bitcoin and ether ETFs.

U.S. Bitcoin and Ether ETFs See Biggest Outflows Since November Amid Price Slide

U.S. spot bitcoin (BTC$88,457.49) and ether (ETH$2,961.55) ETFs recorded a combined $582 million in net outflows on Monday, marking the largest withdrawals since November 20, as crypto markets weakened and bitcoin dipped to $85,100.

Bitcoin ETFs led the redemptions with $357.6 million exiting, the largest in nearly two weeks. Ether ETFs saw $224.8 million withdrawn, marking a third consecutive day of outflows, according to Farside data.

Historical trends show Monday has been one of bitcoin’s weaker weekdays. Velo data indicates it is the third-worst performing day over the past 12 months, behind Thursday and Friday, with several of bitcoin’s 2025 local lows occurring on Mondays.

A key support level is the U.S. ETF cost basis, representing the average entry price of bitcoin held by ETFs. Currently near $83,000, it has previously provided a rebound during lows on November 21 and December 1, per Glassnode.

Among bitcoin ETFs, Fidelity Wise Origin Bitcoin Fund (FBTC) led outflows with $230.1 million redeemed, followed by Bitwise Bitcoin ETF (BITB) at $44.3 million and ARK 21Shares Bitcoin ETF (ARKB) at $34.3 million. BlackRock’s iShares Bitcoin Trust (IBIT) reported no net flows.

For ether ETFs, iShares Ethereum Trust (ETHA) accounted for most redemptions, with $139.1 million withdrawn.