Crypto markets closed a bruising week with bitcoin down 3.2% and ether down 7.0%, according to a market update published Oct. 12, 2026, by trading firm Wintermute. The same update pegged outflows from spot bitcoin exchange-traded funds at roughly $680 million over the period. The combined numbers sketch a week where the largest tokens lost ground and the funds that had been pulling in cash for much of the year reversed direction.
The ETF flow turns negative
The $680 million pulled from spot BTC ETFs is the kind of weekly figure that gets noticed. These funds had become a steady source of demand, and when that demand flips, the spot market feels it. The mechanics are simple: money leaving the funds means shares are redeemed, the underlying bitcoin is sold to meet those redemptions, and the selling pressure lands on exchanges. A single week doesn't make a trend. A single week also doesn't happen in a vacuum, and this one arrived while both major tokens were already sliding.
Ether's steeper drop
Ether's 7.0% decline is more than double bitcoin's 3.2% move, a gap that matters. When the second-largest asset underperforms the largest by that margin, it usually reflects traders pulling back from risk rather than rotating between the two. Bitcoin has the ETF bid and, arguably, the cleaner institutional story. Ether has the application layer, the staking yield, and a fan base that's louder in good times than bad. In a week like this one, the difference shows up in the percentages.
What Wintermute's update actually says
Wintermute's market update is a regular publication from the firm, and the Oct. 12 edition contains the three figures — the BTC weekly decline, the ETH weekly decline, and the ETF outflow total. That's the substance. There's no forward guidance in the numbers, no price target, no call on where things go next. It's a snapshot. The value is in having the three data points side by side, because they tell a coherent story: spot weakness and fund outflows arriving together, with ether taking the harder hit.
Why this week stood out
Drawdowns of 3% and 7% aren't historically extreme. Bitcoin has had worse weeks. Ether has had much worse weeks. What makes this one worth noting is the $680 million ETF outflow alongside them. Spot bitcoin funds had been a reliable buyer through 2026, and a week where they become a seller changes the math on the bid side of the order book. If the outflows continue, the market loses a support that's been there for months. If they reverse, this week looks like a blip. Nobody knows which yet, and Wintermute's update doesn't pretend to.
The next data point
The obvious thing to watch is next week's ETF flow numbers. One week of redemptions can be noise — a few large holders rebalancing, a fund rebalancing, a tax-related move. Two or three consecutive weeks of outflows is a different animal. The same goes for ether: if it keeps underperforming bitcoin by this kind of margin, the ratio trade starts to look less like a dip and more like a repricing. For now, the market heads into the following week carrying a 3.2% bitcoin loss, a 7.0% ether loss, and a $680 million question about whether ETF money comes back.
