BlackRock's IBIT Sees Record $527.8M Daily Outflow as Bitcoin Breaks Key Support

BlackRock's iShares Bitcoin Trust (IBIT) posted its largest single-day redemption on May 27, as institutional investors continued trimming exposure to U.S. spot Bitcoin ETFs amid a weaker crypto tape. Market data shows IBIT recorded net outflows of about $527.84 million in one session, equivalent to roughly 7,048 BTC leaving the fund. Following the move, BlackRock's Bitcoin holdings fell back below 800,000 BTC to around 794,429 BTC. Trading activity remained heavy, with IBIT logging roughly $1.49 billion in daily volume. Across the broader U.S. spot Bitcoin ETF complex, net outflows topped $733 million on May 27, marking the eighth straight session of negative flows. Grayscale's Bitcoin fund saw more than $104 million in outflows, while Fidelity's spot Bitcoin ETF lost over $60 million. Bitwise and Ark & 21Shares also reported notable withdrawals. Morgan Stanley's MSBT ETF was an outlier, posting about $4.29 million in net inflows for the session. The outflow pressure coincided with a pullback in major tokens. Bitcoin fell nearly 3.5% to around $73,278 after slipping below $74,000. Ethereum dropped about 5% and broke below $2,000. Despite the recent redemptions, U.S. spot Bitcoin ETFs still represent a meaningful share of the market. Combined net assets across the funds stand near $96.45 billion, and the group holds roughly 6.4% of global Bitcoin supply. Investors are now watching upcoming flow data for signs that institutional demand is stabilizing or continues to soften.