American investors have reversed course on spot Bitcoin exchange-traded funds, withdrawing more than $385 million from the U.S. funds last week, according to data from Farside Investors, a widely followed tracker of daily fund flows. The outflows mark a sharp turn after a hot run at the beginning of August, a period during which the funds took in fresh capital every single day.

The week before the reversal, the U.S. spot Bitcoin ETFs attracted more than $865 million in investment — their biggest weekly inflows since April.

Because the funds hold Bitcoin directly and can be bought through an ordinary brokerage account, their flows have become a real-time gauge of institutional appetite since the products launched in the United States in January 2024. Redemptions shrink the pool of Bitcoin the funds hold on behalf of investors, which is why a full week of net outflows is read as demand stepping back rather than sentiment merely shifting on paper.

The shift comes even as the price of the largest cryptocurrency remains flat. Bitcoin was recently trading at $64,066, unmoved over both the past week and the past 30 days.

Investors had initially appeared unfazed by a string of negative headlines. The huge Coldcard hack on July 31 — in which cybercriminals stole over $115 in Bitcoin after discovering a vulnerability in the popular product's software — failed to dent demand. Bitcoin investors also shrugged off a delay in a vote on the long-awaited crypto Clarity Act, market-structure legislation that would clarify how digital assets are regulated and which agencies oversee them, continuing to buy into the funds despite the unfavorable regulatory news.

Last week, however, the picture changed, with investors pulling cash out of the major investment vehicles as tensions in the Middle East began to escalate again. BlackRock's iShares Bitcoin Trust, the largest of the U.S. spot funds, and Fidelity's Wise Origin Bitcoin Fund experienced the biggest outflows, while Morgan Stanley's fund, which debuted in April, received net inflows.

Current macroeconomic headwinds — such as the U.S. war with Iran and rising oil prices — could see inflation go up again. The price of Bitcoin has typically performed well on news that inflation is cooling, because investors expect interest rates to come down. Bitcoin, along with stocks, has also experienced price bumps when President Trump has hinted that a deal with Iran was imminent, but the current war appears to have no end in sight. From here, the markers investors are watching are whether the outflows stretch into a second week of flow data, when the Clarity Act vote is rescheduled, and what coming inflation figures show.

While Bitcoin's price has been relatively stable — it has not budged over the past month — a July report from NYDIG said that the asset's year-to-date performance makes it the worst-performing asset, losing out against U.S. Treasuries, silver, and currencies like the Swiss franc. The report argues that leverage, not spot demand, is driving Bitcoin while value and momentum buyers wait, which makes the ETF tallies one of the few visible measures of that spot demand. It added that if Bitcoin's price action were to match other drawdowns — such as the bear market of 2022 — a “potential cycle low near $38k-$39k” was possible.

This article was written by Mathew Di Salvo and first published by Bitcoin Magazine.