US spot bitcoin and ether ETFs both closed Friday with net inflows, the first session in days where the two largest crypto fund categories moved in the same direction, as bitcoin pushed back above $81,000.
Bitcoin ETFs recorded $433 million of net inflows on Friday, according to Farside Investors data. Fidelity’s FBTC led with $310.7 million, followed by BlackRock’s IBIT at $108.4 million. It was the second consecutive day of net inflows for the category, after Thursday’s $159.5 million session led by IBIT’s $183.7 million.
Ethereum ETFs took in $143.7 million the same day, ending a three-day run of outflows that had drained roughly $405 million from the category. Thursday alone saw about $39.3 million leave the funds, with BlackRock’s ETHA accounting for $42.9 million of that.
A week of whiplash
The week’s flows tell a story of a market repricing around the Federal Reserve’s Sept. 16 rate hike and the Senate’s failure to advance the CLARITY Act a day earlier. Combined bitcoin and ether funds lost roughly $520 million on Sept. 16, the worst single day of the week.
The Friday recovery matters mostly for what it breaks. The prior week, Sept. 8-11, had seen bitcoin funds lose $462.7 million over four sessions, led by ARK 21Shares’ ARKB at $234.2 million out and Grayscale’s GBTC at $129.1 million. Ethereum funds went the other way that week, gaining $196.9 million while bitcoin bled. The two categories have been trading flows almost like substitutes: one week ether funds absorb what bitcoin funds shed, the next week the reverse.
Friday’s synchronized inflow is the first sign in roughly two weeks that the split has closed. The post-Fed price recovery helped. Bitcoin climbed from the mid-$77,000s on Thursday to above $81,000 by Friday, its first move past that level in more than a week, and ether held above $2,500 with traders targeting the $2,550 resistance. Solana and Hyperliquid each rose about 10% on Friday as traders moved past the CLARITY Act setback, and altcoin open interest overtook bitcoin’s for the first time in 21 months, a sign that risk appetite in derivatives had recovered faster than fund flows.
Where the money went
The concentration in Friday’s bitcoin flows is notable. FBTC and IBIT together accounted for $419 million of the $433 million total, more than 96%. Smaller funds were flat or slightly negative, with VanEck’s HODL recording minor outflows in both of the week’s final sessions.
That pattern has defined 2026. Citi research using daily data from the five largest US spot funds found that every $100 million of net inflow correlates with a same-day price move of roughly 53 basis points, building to about 96 basis points over ten trading days. But a meaningful share of headline flows are hedged rather than directional. In the cash-and-carry trade, an institution buys ETF shares and simultaneously shorts CME futures to capture the basis, which registers in the flow data as demand even though the position is delta neutral. Analysts estimate roughly half of weekly flow volatility tracks hedge funds adding futures shorts, with correlations as high as 0.70.
The cumulative picture is still fragile. Net flows across US spot bitcoin ETFs have been negative in about half of all 2026 sessions, up from 31% of sessions in 2024 and 40% in 2025. Cumulative net inflows since the January 2024 launch stand above $55 billion, but the category’s longest outflow streak this year, 13 sessions in May and June, shed $4.37 billion.
What analysts are watching
The week ended with a split view on where the market goes next. CoinShares argued a hawkish Fed and the failed CLARITY Act vote leave bitcoin without a path above $80,000 into year-end. VanEck took the other side, calling for $100,000. JPMorgan’s note on gold versus bitcoin ETF flows added a different angle: gold funds have recovered all of their 2026 outflows while bitcoin funds have recovered only half, and heavy short interest in IBIT could flip that comparison if hedging demand fades.
On-chain data suggests conviction among large holders did not waver during the outflow streak. Whales have been moving ether into staking rather than selling, and exchange balances have drained to multi-year lows even as ETFs shed assets. Bitcoin wallets holding 100 BTC or more added roughly 60,000 BTC in August, per CryptoQuant, buying almost exactly what smaller wallets sold.
The Fed overhang
The central bank remains the variable that flows cannot override. The Fed raised rates 25 basis points on Sept. 16, its first hike since 2023, and the Bank of Japan followed a day later with a split 7-2 vote to 1.25%. Higher yields raise the opportunity cost of holding assets that pay no income, and the 10-year Treasury yield touched 5% on Friday even as tech stocks led equities higher.
For ETF demand specifically, the risk is that hedged flows unwind rather than convert. If the basis narrows, cash-and-carry positions close and the same ETF shares that registered as inflows show up as redemptions. That dynamic, more than retail sentiment, is what made the category’s flow record so noisy this year.
Next week’s calendar is light on scheduled catalysts, which means flows themselves will likely set the tone. Two straight green sessions is not a trend, but after a week that started with half a billion dollars leaving the funds, the direction of Friday’s tape counts for more than its size.