Here is the most recent update on US spot BTC ETF flows. As of Tue, Sep 22, 2026, the market experienced an influx of +$714.7m, marking another massively successful day for spot Bitcoin ETFs. When you combine this figure with the +$999.0m recorded on Monday, the overall total for the first two days reaches a remarkable +$1.71B. These figures clearly highlight that ETF demand is maintaining an exceptionally strong pace as we begin the week.