BlackRock’s IBIT enters top 5 ETFs in YTD flows amid $6.5B monthly ‘Full Pac-Man’ bitcoin spree, says Bloomberg’s Balchunas

BlackRock's IBIT spot bitcoin exchange-traded fund has entered the top five ETFs by year-to-date flows despite ranking just 47th one month ago, according to data from Bloomberg Senior ETF Analyst Eric Balchunas.

IBIT's 2025 net inflow tally is now up to $8.9 billion, per The Block's data dashboard , having gone "Full Pac-Man," generating a near $6.5 billion in net inflows since April 21, Balchunas noted on X.

The Swift climb sees BlackRock's spot bitcoin ETF closing in on the iShares 0-3 Month Treasury Bond ETF (SGOV), Vanguard Total Stock Market ETF (VTI) and the SPDR Portfolio S&P 500 ETF (SPLG), with $16.8 billion, $15.2 billion, and $13 billion in year-to-date inflows, respectively. 

It took fifth place after attracting $287.5 million worth of net inflows on Tuesday, overtaking the SPDR Bloomberg 1-3 Month T-Bill ETF on $8.8 billion. However, IBIT would require some moves in the second half of the year to surpass the Vanguard S&P 500 ETF, which has already racked up $64.5 billion worth of net inflows in 2025.

Assets under management hit $66.9 billion

Among those top five, IBIT also ranks fourth by assets under management with $66.9 billion, trailing VOO, VTI, and SPLG on $661.5 billion, $477.5 billion, and $68.4 billion, respectively. However, more established ETFs outside the top five by 2025 inflows also have larger AUMs.

"As gold and cash ETFs slip down, the leaderboard is slowly turning back into 2024," Balchunas said, when BlackRock's IBIT took third place overall with a remarkable $37.4 billion worth of net inflows in its inaugural trading year.

The combined U.S. spot bitcoin ETFs, including $1.5 billion in outflows from Grayscale's converted GBTC fund, have brought in $7.6 billion in cumulative net inflows so far in 2025. Some $7.4 billion of this was generated in the last month alone, following over $5 billion in outflows during the February to April President Trump-tariff-fueled market turmoil.