Spot Bitcoin and Ethereum ETFs Pull in $492 Million on August 21

Spot Bitcoin and Ethereum exchange‑traded funds (ETFs) recorded a combined net inflow of $492 million on the August 21 trading session, extending a five‑day streak of positive flows for both asset classes.

Daily inflows by product

According to Farside Investors data, spot Bitcoin ETFs attracted $307 million, led by BlackRock’s IBIT fund, which alone contributed $239.3 million. Spot Ethereum ETFs added $185 million, with BlackRock’s ETHA fund accounting for $151 million of that total.

Weekly momentum

Over the preceding week, Bitcoin ETFs accumulated $1.92 billion in net inflows, while Ethereum ETFs gathered $697 million. These figures reflect weekly momentum rather than cumulative assets under management.

BlackRock’s dominant position

BlackRock topped both categories, reinforcing its role as the leading institutional gateway for crypto ETFs. Larger funds typically provide deeper liquidity, tighter spreads, and greater investor confidence, which can attract additional capital.

Implications of the five‑day streak

A single day of strong inflows can be an outlier, but five consecutive positive sessions suggest consistent investor interest rather than a one‑off allocation. Continued inflows could help solidify the market’s foundation, while a rapid reversal would indicate a more momentum‑driven rally.

What to watch next

Analysts will monitor whether inflows persist amid price volatility and whether Ethereum ETFs keep pace with Bitcoin ETFs. Sustained demand across both products would signal broader institutional appetite for crypto exposure.