BlackRock’s IBIT holds over 3% of Bitcoin supply following record $970 million inflow

BlackRock’s iShares Bitcoin Trust (IBIT), the largest spot BTC exchange-traded fund by net assets, recorded a positive inflow of $970 million on April 28. This marks its second-largest single-day inflow since launching in January 2024.

The strong inflow pushed IBIT’s assets under management to over $56 billion. According to SoSoValue data, the fund controls over 3% of BTC’s 21 million total supply.

While IBIT’s performance stood out, the broader US spot Bitcoin ETF market faced significant outflows on the same day.

Data from SoSoValue showed that most spot Bitcoin ETFs recorded either flat activity or negative net flows.

ARK Invest’s ARKB led the day’s losses with an outflow of $226 million. Fidelity’s FBTC followed closely, seeing $86.87 million exit. Grayscale’s GBTC reported $42 million in outflows, while Bitwise’s BITB shed another $21.1 million.

Despite the widespread outflows, IBIT’s strong inflow helped extend the overall market’s positive momentum. The US spot Bitcoin ETF sector has now recorded seven consecutive days of net inflows, totaling around $4 billion during the period.

Commenting on these activities, Bloomberg ETF analyst Eric Balchunas noted that spot bitcoin ETFs are moving “two steps forward after one step back.” He added that this gradual but consistent progress aligns with early predictions for the ETF sector’s growth pattern.

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