Bitcoin ETFs see $13M outflows while Ethereum ETFs pull in $216M in a single day

The crypto ETF market delivered a split verdict on September 11. Bitcoin funds bled $13.29 million in net outflows on the day, while Ethereum ETFs absorbed $216 million in fresh capital.

The $13.29 million Bitcoin ETF outflow figure comes from SoSoValue's tracker, but context matters here. In the three days running up to September 11, Bitcoin ETFs had already shed roughly $450 million in net outflows. The $13.29 million reading on the 11th looks less like a recovery and more like the bleeding slowing to a trickle after a rough week.

For comparison, Bitcoin ETFs posted a single-day inflow of $730.9 million on September 3. The reversal from that high to sustained outflows within days is the kind of whipsaw that keeps risk managers up at night.

It is worth flagging that different data providers are not always reading from the same sheet. Some trackers reported Bitcoin outflows closer to 3,391 BTC on the same date, which works out to roughly $267 million at prevailing prices, alongside Ethereum-side outflows of 17,723 ETH, valued at approximately $46 million. The methodology gap between trackers reflects the fragmented nature of ETF flow reporting, where timing of NAV calculations and data cut-off windows can produce materially different headlines from the same underlying market activity.