Bitcoin ETFs Add $999 Million In Best Day Since October 2025: What's Going On?

U.S. spot Bitcoin (CRYPTO: BTC) ETFs pulled in $998.95 million Monday, their largest single-day inflow in 11 months, as Bitcoin briefly surged above $87,000.

What the ETF Data Shows

According to SoSoValue data, BlackRock’s IBIT (NASDAQ:IBIT) led the inflows with $381.4 million, followed by Ark & 21Shares‘ ARKB (BATS:ARKB) at $289.1 million and Fidelity’s FBTC (BATS:FBTC) at $238.8 million. 

Grayscale, Bitwise, and Morgan Stanley (NYSE:MS) funds also logged positive flows. Monday’s total marks the biggest day since Oct. 6, 2025, when inflows hit $1.2 billion.

Meanwhile, Spot Ethereum (CRYPTO: ETH) ETFs matched the momentum, pulling in $269.98 million, their largest single-day inflow since Oct. 7, 2025.

Why the Move Happened So Fast

CryptoQuant broke down the mechanics on X, noting that ETF demand was only part of the story. Three forces stacked together to drive the move:

• Fresh ETF demand — the $999 million inflow represents nearly 12,000 BTC bought in a single day
• Short squeeze — $345 million in Bitcoin shorts got liquidated on top of that demand
• Thin resistance — URPD data shows little historical trading activity between $80,000 and $85,000, letting price move through that zone almost unopposed