Bitcoin ETFs shed $120M in a day while Ethereum ETFs quietly attract inflows
US spot Bitcoin ETFs hemorrhaged $120.2 million on September 9, marking the second straight day of net redemptions. Meanwhile, Ethereum ETFs moved in the opposite direction, pulling in $34.75 million on the same day.Zoom out to the trailing seven days and Bitcoin ETFs actually posted roughly $820 million in net inflows. One day's red ink looks a lot less alarming when the weekly ledger is still deeply green.The Bitcoin ETF outflows on September 9 were concentrated in two familiar names. ARK 21Shares' ARKB led the retreat with $78 million in net redemptions, while Grayscale's GBTC shed $27.2 million. The prior session, September 8, had already seen $46.6 million leave Bitcoin ETFs, bringing the two-day total to roughly $166.8 million.That back-to-back daily outflow streak was the first of its kind since mid-August. For context, September 3 alone saw $730.9 million pour into Bitcoin ETFs. So the recent pullback erased less than a quarter of a single day's inflows from earlier in the month.Ethereum ETFs told the opposite story. The $34.75 million in net inflows on September 9 was driven primarily by BlackRock's staking-enabled ETHB product, which accounted for $22.94 million of that total.Since spot Bitcoin ETFs launched in the US, they've attracted approximately $55 billion in total net inflows. However, 2026 as a calendar year has been choppier, with roughly $1.07 billion in net outflows on the year overall.That year-to-date deficit means Bitcoin ETF investors in aggregate have been net sellers in 2026, even as individual weeks post massive inflows.For Bitcoin ETFs, the consecutive daily outflows are a minor speed bump in what has been a volatile but ultimately positive flow trend over recent weeks. The $730.9 million single-day inflow on September 3 dwarfs the combined $166.8 million that left over the following two sessions.The year-to-date net outflow figure of $1.07 billion is worth monitoring more closely. If that deficit continues to widen through September, it could signal that institutional allocators are trimming crypto exposure heading into the fourth quarter. Conversely, a strong week of inflows could flip the YTD number back to positive territory relatively quickly, given the magnitude of flows this market routinely produces.