Spot Bitcoin ETFs recorded another $223 million in net outflows on Thursday, marking the record nine-day outflow streak since the funds launched in 2024, according to data from Farside Investors.

The latest streak surpassed the previous record eight-session outflow run recorded in February 2025, though its roughly $2.84 billion in cumulative withdrawals remains below the $3.2 billion lost during the earlier selloff.

US spot Bitcoin ETF outflows in May 2026 versus February 2025. Source: SoSoValue

Visualizing further shows BTC ETFs have seen outflows for 13 of the last 15 days...

The outflows suggest institutional demand for Bitcoin exposure is weakening through the ETF channel, and come as major corporate holders such as Strategy face renewed pressure even as some new altcoin products like Hyperliquid (HYPE) ETFs continue attracting investor interest.

BlackRock's IBIT leads the outflows at $2 billion

Signs of institutional selling have also emerged beneath the surface.

BlackRock's iShares Bitcoin Trust (IBIT), the largest US spot Bitcoin ETF by assets, accounted for a massive share of losses during the nine-session outflow streak, recording its largest single-day outflow since launch earlier this week, driven largely by a sizeable dark pool transaction.

The fund recorded roughly $2.04 billion in cumulative outflows between May 15 and Thursday. As Cointelegraph reported, a $527.8 million withdrawal on May 27 marked IBIT's second-largest daily outflow on record, narrowly below the $528.3 million record posted on Jan. 30, 2025.