CoinucationHow to read spot Bitcoin and Ethereum ETF flows
By Coinucation Editorial · Published Oct 6, 2026, 13:00 UTC · 5 min read
Since the US spot Bitcoin ETFs launched on January 11, 2024, and the spot Ethereum ETFs followed in July 2024, "ETF flows" have become a daily talking point. The number is simple in principle: how many dollars moved into or out of the funds that day. Reading it well takes a little more care.
What a flow number is
A net flow is creations minus redemptions, in dollars, for one fund on one trading day. When an authorized participant creates new ETF shares, the fund buys the underlying coin; when shares are redeemed, the fund sells. A positive number means the fund grew; a negative number means it shrank.
Three things to check before drawing a conclusion
- Is it one fund or the total? A single fund can see large outflows (Grayscale's GBTC did for most of 2024, partly because of its higher fee) while the group as a whole takes in money. Our ETF tracker shows both.
- Is the day a holiday? US market holidays produce no flows; a zero on those days is not a signal.
- How big is it relative to the market? A $200M inflow is large for Ethereum funds and ordinary for Bitcoin funds. Compare to the fund family's own history, not across assets.
Why we track it
Flows are one of the few crypto demand measures that come from audited, regulated vehicles, with a published daily figure. That makes them a useful anchor for the daily wrap, alongside price, dominance and gas.
Market wraps are generated from Coinucation's own data and reviewed by the editorial team. They are not investment advice. Coinucation is owned by Black Mountain Investment Group, which holds crypto assets; see our disclosure. Ownership and conflict disclosure.