US spot Ether ETFs have lost $1.08 billion in net outflows this month, marking the largest monthly outflow for the category in 2026. The exodus puts the ether funds on track to close October as the weakest month on record for the products this year. Bitcoin ETF inflows, meanwhile, slowed after a brief spike on Monday.
October's retreat by the numbers
The $1.08 billion figure covers net flows across all US spot Ether ETFs through this week. That's a full reversal from the earlier months of 2026, when the funds were pulling in capital. October now stands alone as the heaviest redemption month of the year for the ether products.
No single fund is named in the flow data, and the totals reflect the category as a whole. The shift is sharp enough that it's hard to read it as routine rebalancing. Something changed in how investors are treating ether exposure this month.
Bitcoin flows lose their Monday momentum
Bitcoin ETFs aren't bleeding the way ether funds are, but they're not charging ahead either. Inflows picked up on Monday, then faded. The pattern suggests the spike was event-driven rather than the start of a sustained run.
That divergence matters. If bitcoin and ether ETFs were moving in lockstep, you could chalk it up to broader risk appetite. They aren't. Ether funds are taking the harder hit while bitcoin products simply lose steam.
Why the ether funds are taking the brunt
The facts don't pin down a cause, and it's worth being honest about that. What's clear is the scale: a billion-dollar monthly outflow is the kind of number that gets noticed on trading desks. The ether ETFs launched with plenty of hype, and months like this test whether that capital was sticky or just passing through.
Part of the issue is structural. Spot Ether ETFs hold a single asset, and when sentiment on that asset sours, there's no buffer. Bitcoin funds at least have the larger, more liquid market behind them. Ether's smaller footprint means the same dollar amount of selling does more damage.
What to watch before month-end
October still has several trading days left, and the final monthly tally won't be locked until the last session closes. The question now is whether the outflows accelerate or stabilize into the weekend. A continued slide would cement October as the worst month of 2026 for US spot Ether ETFs by a wide margin.
Bitcoin ETF flows are the other number to track. If Monday's spike turns out to be a one-off, the cooling could spread. If inflows rebuild, the ether funds may find some cover. Either way, the next few sessions will tell us whether this is a blip or a trend.
