BlackRock's iShares Bitcoin Trust (IBIT) recorded a $448 million net outflow on May 18, 2026. This withdrawal was the largest among all spot Bitcoin ETFs for the day.
The total net outflow for the entire spot Bitcoin ETF category reached approximately $649 million. This event marks one of the largest single-day outflows for the market in 2026.
Institutional investors reduced exposure to the market leader amid broader market uncertainty. The move suggests a notable shift in institutional sentiment.