U.S. spot cryptocurrency ETFs faced another difficult session on September 16, as both Bitcoin and Ether investment products recorded substantial withdrawals, according to daily flow data.

Bitcoin spot ETFs posted $296 million in net outflows, while Ether spot ETFs recorded another $224 million in withdrawals. Together, the two categories saw approximately $520 million leave during the trading day, as redemptions outpaced new investment in funds that hold Bitcoin and Ether directly and trade on U.S. exchanges. The point to weaker demand across the two largest U.S. spot crypto ETF markets, a segment that opened to traditional investors with the January 2024 debut of spot Bitcoin funds and the July 2024 launch of their Ether counterparts.

BlackRock's ETHA Leads Ether Redemptions

Within the Ether ETF category, BlackRock's ETHA recorded the largest redemption of the day, with $110 million in net outflows.

Bitcoin ETFs also faced broad selling pressure, although Morgan Stanley's MSBT moved against the overall trend. The fund attracted $3.47 million in net inflows, making it a notable exception during a day dominated by withdrawals. The mixed performance shows that individual funds can continue attracting capital even when the wider ETF category experiences net redemptions.

The combined flow figures were highlighted in a September 17 post by crypto news outlet Wu Blockchain on X:

U.S. Bitcoin, Ether ETFs See $520 Million Combined Outflow as BlackRock ETHA Leads Redemptions

U.S. spot Bitcoin ETFs recorded $296 million in net outflows on Sept. 16, while spot Ether ETFs saw another $224 million leave, bringing combined daily outflows across the two… pic.twitter.com/hScqr16tqW

— Wu Blockchain (@WuBlockchain) September 17, 2026

Crypto ETF Demand Faces Another Test

The latest round of Bitcoin and Ether ETF outflows puts institutional demand back in focus. Daily ETF flows are closely monitored by market observers because they provide a direct view of capital entering and leaving regulated crypto investment products, making them one of the most immediate indicators of shifting investor appetite for spot crypto exposure in the United States.

A single day of withdrawals does not establish a longer-term trend, and flow data can swing sharply from session to session as institutional positioning adjusts. Still, continued outflows could indicate more cautious positioning among investors. Market participants will be watching upcoming sessions to see whether Bitcoin and Ether ETFs return to positive flows or whether redemptions continue.

Source: CoinoMedia