$3.8 billion flowed into US spot Bitcoin ($BTC) exchange-traded funds over three weeks, the strongest such window for the category so far in 2026. The most recent week contributed nearly $1 billion of that total, leaving the prior two weeks to account for roughly $2.8 billion combined.
Friday supplied the sharper data point. Bitcoin slipped briefly below $79,000, and inflows stayed positive through that move. A pullback of that sort would typically generate redemptions from momentum-aligned holders. It did not. Buyers through the ETF wrapper absorbed the intraday dip rather than pulling out.
The three-week run-rate implied by $3.8 billion across the period works to roughly $1.27 billion per week. At nearly $1 billion, the latest week printed below that average, meaning the window's early weeks ran hotter. The cumulative total still marks the year's strongest consecutive three-week print.
That separation between ETF flow and spot price matters from a protocol read. When $BTC exposure comes through a registered fund, the decision logic doesn't always track intraday moves. Friday illustrated the gap: Bitcoin briefly broke $79,000 to the downside, the weekly flow stayed near a billion dollars, and the three-week total set a 2026 high.