Bitcoin
EthereumMonthly Overview
In September 2025, net flows into spot crypto ETFs were positive, totaling +$3.8B. Only two assets experienced flows during the month, with Bitcoin and Ethereum being the primary contributors.
Weekly Breakdown
| Week | Net flow |
|---|---|
| Sep 2 – Sep 5 | -$537.3M |
| Sep 8 – Sep 12 | +$2.9B |
| Sep 15 – Sep 19 | +$1.4B |
| Sep 22 – Sep 26 | -$1.7B |
| Sep 29 – Sep 30 | +$1.7B |
Biggest Fund Moves
Largest inflows
- BlackRock (BTC): +$2.7B
- Fidelity (BTC): +$525.0M
- BlackRock (ETH): +$315.0M
- 21Shares (BTC): +$178.2M
- Grayscale BTC (BTC): +$140.5M
Largest outflows
- Grayscale (BTC): -$200.2M
- Fidelity (ETH): -$51.6M
- Bitwise (ETH): -$38.8M
- Grayscale (ETH): -$28.7M
- 21Shares (ETH): -$8.8M
Market Interpretation
Bitcoin saw significant capital inflows, particularly from BlackRock and Fidelity, which added +$2.7B and +$525.0M respectively. Ethereum also recorded inflows, albeit to a lesser extent, highlighted by a +$315.0M contribution from BlackRock. Notably, the worst day of the month was September 26, when outflows peaked at -$666.7M, suggesting a period of volatility, while the best day on September 29 saw a recovery with inflows of +$1.1B.
Conclusion
Overall, the month concluded with a net inflow of +$3.8B. This positive momentum indicates continued interest in spot crypto ETFs.
Flows are net creations minus redemptions, published the next morning (T+1). Text written by AI from computed figures. Market data for informational purposes only. Not investment advice.