US spot bitcoin exchange-traded funds recorded a net capital inflow of $517.1 million on Wednesday, August 19, according to data from financial tracking service SoSoValue.
The surge signals a return of investor capital to cryptocurrency investment products following a sharp rebound in the price of bitcoin.
Eight of the 12 spot bitcoin ETFs tracked by the market recorded positive inflows during the trading session. The iShares Bitcoin Trust (IBIT), managed by investment firm BlackRock, led the market with a net inflow of $284.7 million. It was followed by the ARK 21Shares Bitcoin ETF (ARKB), operated by Ark Invest and 21Shares, which drew $77.7 million, and Fidelity's Wise Origin Bitcoin Fund (FBTC), which gathered $62.4 million.
The total capital entry on August 19 represents the highest single-day inflow for bitcoin funds since May 4. The positive movement marks a reversal from the previous trading week, when American spot bitcoin ETFs lost approximately $390 million. The largest capital outflows during that downturn came from Fidelity's FBTC fund and Grayscale's GBTC fund.
Bitcoin price rally
The renewed demand for exchange-traded products coincided with a sharp rally across the broader cryptocurrency market. On Wednesday, bitcoin climbed above $69,000 for the first time in two months, while ether grew past $2,000.
Shares of companies tied to digital assets also increased as investor appetite for high-risk assets strengthened. Spot bitcoin ETFs allow institutional and retail market participants to trade exposure to the leading digital currency on traditional stock exchanges without holding the underlying tokens directly. BlackRock, Fidelity and Ark Invest are among the major financial firms offering these funds to American investors.
Treasury buyback and SEC rules
One of the primary catalysts for the market growth was an announcement by the US Department of the Treasury to double its long-term Treasury bond buyback operations under a government liquidity support program. Sovereign debt buybacks allow governments to purchase back outstanding bonds to manage public debt and support fixed-income market stability.
Starting September 9, the maximum volume for repurchasing government debt securities maturing in 10 to 30 years will increase from $2 billion to at least $4 billion per operation.
Investor sentiment may also have improved following crypto asset issuance rules proposed by the US Securities and Exchange Commission (SEC), the federal regulator overseeing American capital markets. The agency presented two options for exempting cryptocurrency issuers from mandatory registration. The first proposal is a one-time exemption allowing companies to raise up to $5 million over four years, while the second option permits issuers to collect up to $75 million from investors every 12 months.
