According to preliminary data published on Wednesday, U.S. spot Bitcoin (BTC) (ETF) exchange-traded funds attracted over $880 million on Tuesday, led by the Fidelity fund.

Bitcoin rose to over $71,000 during Asian trading hours when the data became available, resulting in a 3% increase over the past 24 hours. The broad CoinDesk 20 (CD20) index, which includes the largest tokens, rose by 2.65%.

The ETF FBTC from Fidelity received an inflow of $378 million, the highest among competitors. It was followed by IBIT from BlackRock with $270 million, and GBTC from Grayscale, known for its outflows, attracted $28 million.

This day marked the best inflow since March and the second largest since the launch of 11 Bitcoin ETFs in January.

The inflow activity has intensified amidst generally bullish sentiment after several sluggish weeks from mid-April to early May, when on some days there were zero or even negative net inflows into large ETFs like IBIT from BlackRock.

Bloomberg analyst Eric Balchunas reported on X that over the past four weeks, ETFs have attracted $3.3 billion, with their net income since the beginning of the year exceeding $15 billion.

The increase in activity occurred a few weeks after the approval of a spot ETF for Ethereum (ETH) in the U.S., and amid positive prospects for cryptocurrencies due to the ongoing U.S. presidential campaign.