A 43% quarterly gain pulled the average US spot Bitcoin ETF investor above water for the first time since January
The average US spot Bitcoin ETF holder spent most of 2026 underwater. According to ARK Invest, that is no longer the case.
The firm reports that holders’ investment gained 43% in a single quarter, a move it says indicates the market may be turning positive .
Rewind to mid-July. Cumulative net outflows from US spot Bitcoin ETFs had reached approximately $5.8 billion, driven by Bitcoin’s choppy price action.
Then the price turned. Bitcoin climbed from about $59,500 in early July to around $85,000 by early October, a gain of roughly 42.9%.
That rally mattered for one specific number: the average holder’s cost basis. Estimates put it between $81,722 and $82,000.
Cost basis is simply the average price investors paid to get in. Once Bitcoin traded above that range, the typical ETF buyer was sitting on a profit for the first time since January.
The flows followed the price. In the week ending September 25, 2026, US spot Bitcoin ETFs took in net inflows of approximately $2.4 billion.
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That was the biggest weekly haul since October 2025. It also flipped total 2026 flows back into positive territory, with estimates ranging from $800 million to $934 million.
The single biggest day came on September 21, when inflows hit nearly $999 million.
BlackRock’s IBIT led the category. ARK’s own product, the ARK 21Shares Bitcoin ETF, ticker ARKB, pulled in roughly $289 to $295 million during its peak week in September.
Across the funds, ETF holdings grew by approximately 88,000 BTC since July, lining up closely with the price surge.
The most important figure here may be the cost basis range itself. With Bitcoin around $85,000 and the average entry near $81,722 to $82,000, the typical holder’s cushion is only a few thousand dollars.
ARK’s framing describes the market as one that may be turning positive. Note the hedge: may.
The flow data does point to renewed institutional engagement. A $2.4 billion week and a near-$999 million day are not the behavior of a crowd that has given up on the asset.
The approximately $5.8 billion outflow by mid-July happened because holders reacted to losses, and the reversal happened because they reacted to gains.