Spot Bitcoin ETFs attracted $998.95 million in net inflows on Sept. 21, the largest one-day intake since Oct. 6, 2025. According to SoSoValue data, this figure marks the ninth-largest single-day total since the funds began trading on Jan. 11, 2024. The capital flow occurred as the broader cryptocurrency rally continued its upward trajectory.
| Metric | Value |
|---|---|
| Sept. 21 Net Inflow | $998.95 million |
| Month-to-Date (Sept.) | $1.31 billion |
| August Total Inflow | $3.52 billion |
| 2026 YTD Balance | -$450 million |
The daily intake reconciles with the monthly picture. The Sept. 21 inflow pushed the September tally to $1.31 billion. That figure builds on the $3.52 billion in capital that flowed into Bitcoin ETFs during August. Despite the strong recent performance, the funds remain down $450 million year-to-date in 2026, a deficit driven by significant redemptions earlier in the year.
Price Action And Asset Performance
Bitcoin traded at $86,000 on Sept. 22, reflecting a 44% surge over the past month. The rally, which began in late August, has seen the asset outperform all other major classes, including gold. The last record high was set on Oct. 6, 2025, when the price hit $126,000. The current strength in capital allocation is viewed as a vote of confidence from institutional investors in the underlying asset.
The math on the monthly flow shows a clear acceleration in interest. The $1.31 billion captured in September so far compares against the $3.52 billion recorded in the prior month. The per-unit inflow on Sept. 21 alone accounts for nearly 76% of the month's total to date. This ratio highlights the concentration of buying activity in the final days of the month.