US spot Ethereum ETFs took in $216.41 million on Friday, their strongest day since August 27, while bitcoin ETFs posted a fourth consecutive day of net outflows at $13.29 million. The split came on the same session, and the gap between the two products is now wide enough to count as a trend rather than a blip.
Data from SoSoValue shows BlackRock’s ETHA led the ether inflows with $148.82 million, followed by Bitwise’s ETHW at $29.09 million and Fidelity’s FETH at $11.40 million. Total ether ETF volume reached $2.56 billion, nearly matching the $2.6 billion traded across bitcoin funds despite ether funds being far smaller. Net assets across ether ETFs rose to $16.31 billion.
Over the week, ether ETFs attracted about $197 million, their fourth straight week of inflows. That is despite a $24 million outflow day on September 9, which briefly interrupted the run.
Bitcoin’s reversal from a strong week
The bitcoin side tells a sharper story. Bitcoin ETFs took in $986.9 million in the week ending September 4, including a single-day record of $730.9 million on September 3. Then the direction flipped. Three sessions shed roughly $450 million combined, followed by Friday’s $13.29 million outflow.
Friday’s number is small, and that matters less than the pattern. After a near-billion-dollar week, four straight outflow days from the same authorized participants who did the buying suggests the August wave has cooled rather than paused. Bitcoin ETFs remain about $1 billion short of break-even for 2026, so even a strong stretch leaves the category underwater for the year.
BlackRock’s IBIT lost $19.23 million on Friday, while Morgan Stanley’s MSBT added $3.76 million and VanEck’s HODL took in $2.18 million. Net assets across bitcoin ETFs stand at $97.58 billion. Cumulative net inflows since the January 2024 launch total more than $55 billion, so the structural demand story is intact even as the short-term flows wobble. Total assets under management across the major bitcoin ETF issuers, BlackRock, Fidelity, Grayscale and ARK 21Shares, sit near $97 to $99 billion in mid-September, with IBIT consistently leading on volume.
| Fund | Friday flow | Direction |
|---|---|---|
| BlackRock ETHA | $148.82M | Inflow |
| Bitwise ETHW | $29.09M | Inflow |
| Fidelity FETH | $11.40M | Inflow |
| BlackRock IBIT | -$19.23M | Outflow |
| Morgan Stanley MSBT | +$3.76M | Inflow |
| VanEck HODL | +$2.18M | Inflow |
Why the divergence now
The macro backdrop did not favor either asset. August CPI came in at 0.4 percent month-on-month and 3.4 percent year-on-year on September 11, with core inflation slowing to 2.4 percent, its lowest since March 2021, but the monthly core rise of 0.3 percent was slightly above expectations. Goldman Sachs expects the Fed to hike 25 basis points at the September 16 meeting, and rate-hike odds on prediction markets sit above 85 percent.
A rate environment like that pressures risk assets broadly, which makes the ether inflows harder to dismiss as simple beta. Ether briefly touched $2,665 on Friday before settling near $2,515, while bitcoin holds around $77,000, down 11.7 percent since January 1 and 33.5 percent over the past year. Higher rates raise the opportunity cost of holding non-yielding assets, and both bitcoin and ether sit in that bucket, though ether’s staking yield gives it a partial cushion that bitcoin lacks.
Two other readings support the rotation case. Ether reserves on exchanges have been declining, a sign holders are moving coins off trading venues into cold storage or staking contracts. And ether ETFs have now outdrawn bitcoin funds for the week even though bitcoin products are larger and have a two-year head start in the market.
Not every data provider agrees on the exact figures. Different trackers treat creation and redemption timing differently, and single-day numbers can shift on revision. The direction, though, is consistent across sources.
Caution before calling it a trend
One strong session is not a regime change. The ether category needs several sessions above $200 million to establish a pattern, and analysts have pointed out that a single day can reflect one allocator’s rebalancing rather than a broad institutional move. September 9’s $24 million outflow shows how quickly the sign flips in a category this small.
The XRP side offers another warning about reading too much into flow data. XRP ETFs recorded $36 million in secondary market volume on Friday with exactly $0.00 in net flows, meaning no shares were created or redeemed at all. Trading activity and fund creation are different things, and only the second kind moves the flow numbers. Cumulative XRP ETF inflows stand at $1.70 billion against net assets of $1.45 billion, with the coin down 26.2 percent since January 1, so the funds are underwater on what they hold.
For bitcoin, a fifth straight outflow day would confirm weakness going into the Fed decision. For ether, the test is whether the inflows persist once the rate decision lands. Both assets face the same macro event next week, and the flows suggest institutions are positioning for it differently rather than de-risking across the board.
If capital were simply leaving crypto, outflows would show up in both categories. Instead, the money appears to be moving within the crypto ETF complex, from the largest and most liquid product to its closest rival. That is a rotation, and rotations can reverse as fast as they start. The September 16 decision will tell us whether ether’s bid is conviction or just a waiting room.