Bitcoin, Ethereum Spot ETFs Extend May 2026 Outflows

U.S. spot Bitcoin ETFs recorded a $334 million net outflow on May 26, SoSoValue data showed. That equates to roughly 4,374 to 4,404 BTC leaving in a single session. Spot Ethereum ETFs also saw redemptions, posting a $35 million net outflow the same day. Heavy selling pressure has persisted through May. Earlier in the month, Bitcoin ETFs logged even larger one-day withdrawals: $649 million on May 18 and $635 million on May 13. Weekly net outflows from mid- to late May topped $1.2 billion, the largest weekly drain since late January, when a similar redemption wave unsettled markets. Ethereum spot ETFs have shown sustained weakness as well, with at least 10 straight days of net outflows through May 22. The $35 million outflow on May 26 indicates the streak likely continued or resumed after a brief interruption. Despite the recent drawdown, U.S. spot Bitcoin ETFs have taken in more than $57 billion in cumulative net inflows since launching in January 2024. Ethereum products have accumulated over $11 billion in net assets over a similar period. While Bitcoin and Ethereum funds were losing assets, exchange-traded products tied to Solana and XRP posted modest inflows. For investors, the scale matters. A one-day move of about 4,400 BTC implies tangible selling pressure because ETF redemptions typically require managers to liquidate underlying holdings rather than simply reshuffle positions. Ethereum ETF flows have historically been more volatile and can remain negative for longer stretches; the 10-plus day run of outflows through late May points to a sharper cooling in institutional demand for ETH exposure than for Bitcoin. Flow trackers such as SoSoValue have become a key reference point as daily and weekly ETF data increasingly serves as a real-time gauge of whether institutional capital is entering or exiting the market.