Bitcoin ETF inflows took more than 80% of the week's money

US spot bitcoin and ether ETFs pulled in $1.2 billion in the week to 4 September, and bitcoin ETF inflows took more than four fifths of it. The other funds did not lose money. They stopped attracting it.

The numbers behind the split

Spot bitcoin ETFs closed their best three-week run of 2026, with $3.8 billion in net flows and $986.9 million in the week ending Friday. A single session on 3 September brought $730.8 million, the largest daily figure since 14 January.

Ether ETF inflows fell 74% week on week to $218.4 million, which puts the prior week near $840 million. XRP fund inflows dropped 83% to $19 million, down from roughly $112 million.

Ether's own week was uneven rather than weak: $87.6 million on 31 August, $8.6 million on 1 September, an outflow of $48.2 million on 2 September, then $141.4 million on 3 September and $25.9 million on 4 September.

A flow figure counts creations and redemptions of fund shares, which authorised participants execute on behalf of the fund. It tells you what allocators working to a mandate did last week. It says nothing about the person who bought spot on an exchange.

We reported the opposite three days ago

On Friday we wrote that bitcoin ETFs had given back $337 million across three sessions while the price rose. Both descriptions are accurate and they cover different windows, which is the honest problem with reading flows day by day.

A week is the shortest unit that says anything, and even a week only says where allocation went, not why.

Prices went the other way

Prices did not move the way the flows did. Bitcoin trades at $79,307, up 2.1% over a week. Ether sits at $2,487, up 2.6%. XRP is at $1.40, up 3.3%. Over a month ether is up 30.4% and XRP 36.4%, against 22.6% for bitcoin.

So the assets that lost fund inflows outperformed the one that gained them. Institutional money returned to the position it treats as the market's beta, while the money already sitting in altcoins stayed there and their prices ran on it.

Leverage explains part of the gap. Friday closed $456 million of shorts on a market where forced buying moves price faster than any allocation does, and none of that shows up in a fund flow table.

Watch whether the ether figure recovers this week. A second 70% drop would make the August number the anomaly, and a return to $800 million would make last week the anomaly instead.

This article is for informational purposes only and does not constitute investment advice.