U.S. spot crypto exchange-traded funds delivered a mixed performance during the September 14–18 trading week, with Bitcoin recovering sharply from midweek withdrawals while Ethereum products remained under pressure.
According to the latest data from Farside Investors, U.S. spot Bitcoin ETFs finished the five-session period close to flat, while Ethereum ETFs recorded a substantial weekly outflow. Solana and Hyperliquid products remained comparatively smaller but continued to attract net capital.
The figures show how institutional demand differed across major crypto assets even as the broader market recovered toward the end of the week.
Bitcoin ETFs Recover After Heavy Midweek Outflows
Bitcoin ETFs experienced a highly volatile week.
The funds recorded a $159.9 million inflow on September 14, followed by large withdrawals of $450.4 million on September 15 and $295.9 million on September 16.
Demand then returned strongly.
Bitcoin ETFs recorded a $159.5 million inflow on September 17, followed by another $324.6 million on September 18. That late-week buying was enough to leave the category with approximately $6.1 million in net inflows for the five-session period.
The reversal coincided with Bitcoin reclaiming the $80,000 level on Friday. Market coverage also linked the broader recovery to falling oil prices and a rebound across equities and crypto-related assets.
Fidelity Leads Friday's Bitcoin Inflows
Fidelity's FBTC was the strongest individual Bitcoin ETF on September 18, recording approximately $310.7 million in inflows.
Bitwise's BITB added $9.7 million, ARKB received $1.9 million and VanEck's HODL recorded $2.3 million.
For the full period, BlackRock's IBIT remained the largest cumulative contributor, although its September 18 figure was not yet reported in Farside's table.
The sharp change in daily flows highlights how quickly institutional ETF demand can shift during periods of high market volatility.
Ethereum ETFs Remain Under Pressure
Ethereum ETFs experienced a much weaker week.
The category recorded a $121.1 million inflow on September 14, before suffering withdrawals of $142 million on September 15, $224.1 million on September 16 and $39.3 million on September 17.
On September 18, Ethereum ETFs returned to positive territory with a $29.4 million inflow.
Despite that recovery, the category still recorded approximately $254.9 million in net outflows across the five sessions based on the latest Farside daily figures.
That makes Ethereum's ETF performance notably weaker than Bitcoin's during the same period.
ETHA and FETH Face Heavy Withdrawals
BlackRock's ETHA experienced particularly large withdrawals during the week.
The fund lost $98 million on September 15, $110 million on September 16 and another $42.9 million on September 17. It did not yet have a reported September 18 figure in Farside's latest table.
Fidelity's FETH also recorded significant withdrawals, including $55.6 million on September 16.
On the positive side, FETH received $26.2 million on September 18, helping Ethereum ETFs close the week with a smaller deficit than the midweek numbers suggested.
CoinDesk also reported that Ether ETFs had experienced three consecutive sessions of withdrawals through September 17, even as ETH itself recovered during the period.
Solana ETF Flows Stay Positive
Solana ETFs continued to attract capital during the week, although the latest Farside data shows a much smaller total than some earlier reports.
Solana products recorded:
$11.0 million on September 14
$1.3 million on September 15
$0.8 million on September 16
$0 on September 17
$0 on September 18
That produced approximately $13.1 million in net inflows for the week.
Bitwise's BSOL accounted for most of the buying, receiving $7.1 million on Monday, $1.3 million on Tuesday and $2.7 million on Wednesday.
Grayscale's GSOL added $3.9 million on Monday before giving back $1.9 million on Wednesday.
The positive weekly flow comes as Solana remained one of the stronger-performing major crypto assets late in the week.
Hyperliquid Products Finish in Positive Territory
Hyperliquid ETFs also ended the week with net inflows.
The category recorded:
$3.9 million outflow on September 15
$1.7 million inflow on September 16
$4.3 million inflow on September 17
$1 million inflow on September 18
That resulted in approximately $3.1 million in net inflows for the week.
Bitwise's BHYP recorded $1.9 million on September 17 and another $1 million on September 18, while 21Shares' products also attracted capital.
The figures remain small compared with Bitcoin and Ethereum ETFs but show continued investor interest in newer crypto investment products.
Bitcoin and Altcoins Show Different Institutional Demand
The week's data highlights a significant divergence among crypto ETFs.
Bitcoin experienced heavy withdrawals early in the week but recovered almost all of them through strong late-week buying.
Ethereum, meanwhile, continued to see substantial withdrawals despite returning to positive flows on September 18.
Solana remained positive overall, while Hyperliquid attracted a smaller amount of capital.
The contrast is particularly notable because the broader crypto market strengthened toward the end of the week. Bitcoin reclaimed $80,000 on September 18, while Solana and Hyperliquid also recorded strong price gains.
What ETF Flows Mean for the Crypto Market
ETF flows have become an important indicator of institutional positioning in digital assets.
Large inflows can indicate increasing demand through regulated investment products, while sustained withdrawals may signal investors reducing exposure.
However, daily ETF flows should not be treated as a direct measure of long-term investor sentiment. Flows can change quickly in response to price movements, macroeconomic developments, hedging activity and portfolio rebalancing.
The latest week demonstrates that clearly: Bitcoin moved from hundreds of millions of dollars in withdrawals to hundreds of millions in inflows within days.
Conclusion
The latest U.S. crypto ETF data shows a clear divergence between major digital assets.
Bitcoin ETFs finished the September 14–18 period with roughly $6.1 million in net inflows after a strong late-week recovery, while Ethereum ETFs recorded approximately $254.9 million in net outflows. Solana ETFs attracted about $13.1 million, and Hyperliquid products added approximately $3.1 million.
The figures also show how quickly institutional flows can change. Bitcoin's late-week recovery coincided with its return above $80,000, while Ethereum continued to face heavier redemptions.
As the new trading week begins, Bitcoin and Ethereum ETF flows will remain important indicators for tracking institutional demand across the crypto market.
