Ether funds draw $1.5 billion over 10 sessions as bitcoin flows reverse

U.S. spot ether exchange-traded products recorded $102.1 million of net inflows during the Aug. 28 securities session, extending their positive run to 10 consecutive sessions and approximately $1.5083 billion, according to Farside Investors data and Coinburn’s calculation.

Bitcoin products moved in the opposite direction Friday, posting $201.9 million of net outflows and ending their own nine-session inflow streak. That divergence matters for Monday’s open because Aug. 31 is the first U.S. trading session in which investors can extend or reverse Friday’s split between the two largest crypto assets.

The finding is narrower than a claim that institutions have broadly rotated from bitcoin into ether. Daily fund-flow estimates do not identify investors, motivations or the timing of any underlying crypto transactions.

BlackRock supplied most of the streak

The ether streak began Aug. 17 and included positive daily totals of $30.9 million, $71.4 million, $186.8 million, $219.5 million, $184 million, $115.6 million, $179.8 million, $192.4 million, $225.8 million and $102.1 million.

BlackRock’s iShares Ethereum Trust ETF, ETHA, accounted for approximately $1.1038 billion, or 73.2%, of the cumulative total. Both figures are Coinburn calculations from Farside’s issuer-level table.

Friday’s result was not uniform across funds. ETHA attracted an estimated $83.8 million, Bitwise’s ETHB received $42.6 million and Fidelity’s FETH lost $24.3 million. The other products in Farside’s table were reported at zero for the session.

BlackRock’s own product page reported $8.378 billion of ETHA net assets and 455.96 million shares outstanding as of Aug. 28. It listed an $18.38 net asset value and an $18.37 Nasdaq closing price for that date. Those issuer figures describe ETHA alone and are not measurements of the combined U.S. ether-product market.

Fund flows are not exchange volume

Exchange-traded products issue and redeem shares through authorized participants. The Securities and Exchange Commission permitted in-kind creations and redemptions for crypto ETPs in July 2025, allowing approved transactions to use the underlying crypto asset rather than requiring every creation or redemption to settle in cash.

Consequently, a reported inflow is not necessarily an equivalent open-market ether purchase executed during the same session. It also does not measure secondary-market turnover, where existing ETP shares change hands without altering the product’s outstanding assets.

Farside describes its table as automatically generated and warns that errors or inaccuracies are possible. Its estimates may be revised and do not disclose authorized-participant inventory, investor identity or whether a creation settled with cash or ether.

Ether’s price clock tells a different story

CoinGecko recorded an aggregated ETH/USD close of $1,912.27 for Aug. 17 UTC and $2,442.41 for Aug. 28 UTC. Coinburn calculates a 27.7% increase between those observations. Ether then closed Aug. 30 UTC at $2,416.24, approximately 1.1% below the Aug. 28 close.

Even Friday’s clocks did not move together: the Aug. 28 CoinGecko close was approximately 2.7% below its $2,511.46 Aug. 27 close while the U.S. products still received $102.1 million. That does not establish that fund demand supported the price, nor that price weakness caused creations.

CoinGecko’s figures aggregate trading across venues over UTC calendar days. Ether trades continuously without a universal closing auction, while Farside’s flow observation follows the U.S. securities session. Different cutoffs, venues and settlement mechanics prevent a clean causal comparison.

Coinburn’s publication window is Aug. 31 in America/New_York, after the weekend price observations and Friday fund estimates were available. Finalized Aug. 31 product flows will not exist until after Monday’s U.S. session. That next row will show whether ether funds retained their positive run as bitcoin products attempted to recover from Friday’s reversal.