The iShares Bitcoin Trust (IBIT) experienced a significant outflow of $201.18 million on September 1, 2026, marking a stark reversal to start the new month. This withdrawal from BlackRock's fund was the primary driver behind a total net outflow of $236.46 million from all U.S. spot Bitcoin ETFs, the largest daily redemption since July 31.
The outflow contrasts sharply with the performance in August, which was the strongest month of 2026 for Bitcoin ETFs, attracting $3.52 billion in net inflows. That positive momentum had helped erase roughly two-thirds of the year's prior deficits and brought the total net assets in Bitcoin ETFs close to the $100 billion mark before this abrupt change in fund flows.