US bitcoin exchange-traded funds drew $731 million in a single day, the largest inflow since January 14, according to SoSoValue data. The surge followed dovish comments from Federal Reserve Governor Christopher Waller on September 3, in which he said the Fed could hold interest rates steady if inflation data supported the decision.
Waller's statement shifted market expectations around the Fed's September meeting. Investors interpreted his remarks as reducing the probability of additional rate increases. The January 14 inflow of $843.6 million remains the largest single-day inflow on record for US bitcoin ETFs, making the September 4 figure the second-largest since the products launched in January 2024.
Bitcoin ETF flows have become a primary liquidity gauge for institutional bitcoin adoption. The products, which include spot bitcoin ETFs launched by iShares, Fidelity, and other issuers, allow US investors to gain bitcoin exposure through traditional brokerage accounts without holding the asset directly. Daily inflow figures track the net capital entering or exiting these vehicles, with large single-day moves often tied to macroeconomic shifts or changes in Fed policy expectations.
The January 14 inflow occurred during a period of market optimism around potential Fed rate cuts. Bitcoin appreciated substantially in the weeks following that figure, rising from roughly $42,000 to over $60,000 by March 2026. The asset has since pulled back, trading near $54,000 as of early September amid broader macro uncertainty.
Waller said the Fed could hold rates steady, conditional on inflation data. Chair Jerome Powell and other governors had previously said the Fed would take a more cautious approach to rate cuts. Waller's openness to holding rates steady meant the Fed's inflation-fighting cycle may have peaked.
September 4's inflow represents a 13 percent increase over the January 14 figure, measured as a single-day move. The velocity of institutional bitcoin adoption through ETFs has accelerated in 2026, with the products now holding over $40 billion in assets under management combined. Whether subsequent inflow days sustain this pace through the remainder of 2026 depends on whether Waller's remarks hold as Fed policy through the September meeting and beyond.
