US Spot Bitcoin ETFs Bleed $635M in a Single Day — IBIT Alone Dumps $285M!

U.S. spot Bitcoin ETFs recorded $635 million in total net outflows on May 13, according to SoSoValue data — one of the heaviest single-session redemption days since the products launched. BlackRock's IBIT, long the dominant inflow engine, led the retreat with $285 million in net outflows, a sharp reversal for the fund that has anchored institutional Bitcoin demand.

The selling pressure extended to Ethereum. U.S. spot Ethereum ETFs posted $36.30 million in net outflows on the same day, with BlackRock's ETHA accounting for the largest single-fund hit at $21.10 million.

When IBIT leads outflows rather than inflows, the signal carries weight beyond the dollar figure — it suggests institutional holders, not just retail, are trimming exposure. A sustained multi-session reversal would be the key threshold to watch for whether this is a one-day flush or the start of a broader de-risking cycle.