Bitcoin Spot ETFs Draw Record-Breaking $998.95 Million Inflow
US Bitcoin spot exchange-traded funds (ETFs) recorded their largest single-day capital intake since October 2025, attracting nearly $1 billion in net inflows on September 21. This marked a significant milestone for the underlying cryptocurrency, which surged past $87,000.
The influx of capital across approximately a dozen funds represented the ninth-largest single-day total since spot Bitcoin ETFs began trading in January 2024. BlackRock's iShares Bitcoin Trust led the session with $381.4 million, followed by ARK 21Shares Bitcoin ETF and Fidelity's Wise Origin Bitcoin Fund.
Alongside Bitcoin allocations, spot Ethereum ETFs gathered $269.98 million in net inflows on the same day, led by BlackRock's Ethereum products bringing in $122.9 million. The combined crypto ETF flows reached $1.27 billion.