The daily inflow of funds into U.S. spot Bitcoin and Ethereum exchange-traded funds (ETFs) has reached its highest level since January, with over $1 billion flowing into these funds against the backdrop of soaring cryptocurrency prices.

On May 21, the net inflow into U.S. Bitcoin ETFs was $608.99 million, with a trading volume of $7.64 billion, the highest since February 2025. The following day, the net inflow into Bitcoin ETFs was $934.8 million, while the net inflow into Ethereum ETFs was $110.5 million.

BlackRock's iShares Bitcoin Trust (IBIT) leads in fund inflows among U.S. ETFs, attracting $877.2 million on May 22, setting a record for the largest single-day inflow of the month. IBIT has also become one of the top five ETFs by inflow this year to date, narrowing the gap with the SPDR Gold Shares (GLD) ETF.

Bitcoin ETFs have seen inflows for eight consecutive days, with a total inflow of $2.75 billion over the past week. The cumulative net inflow into U.S. spot Bitcoin ETFs has surpassed $44.5 billion, setting a record high. In May alone, the net inflow into Bitcoin ETFs has exceeded $3.2 billion.

Ethereum ETFs saw an inflow of $248.2 million over the past week, with a net inflow of $58.6 million on May 23. BlackRock recently purchased $52.8 million worth of Ethereum for its ETF products.

The inflow into Bitcoin ETFs has reached $42.7 billion, while the Chicago Mercantile Exchange (CME) futures open interest stands at $17 billion, down from a peak of $22.8 billion in December. BlackRock has also recently purchased 3,950 Bitcoin (BTC).

As Bitcoin prices surge to over $110,000, a historic high, ETF inflows have also increased.