Bitcoin ETF Inflows Hit $3.52B in August as September Reverses Momentum
Bitcoin (BTC)
Editor:
Eugene Serbin
Tronweekly.com reported that US-listed spot Bitcoin ETFs recorded $3.52 billion in inflows during August, marking the strongest monthly performance of 2026. This surge helped reduce year-to-date net outflows by 66%, bringing the total from $5.29 billion down to $1.77 billion. Bitcoin’s market capitalization reached $1.54 trillion with a dominance of 59.63%, while trading volume hit $44.98 billion.
Bernstein analysts linked the rally to higher liquidity and lower long-term rates following US Treasury buyback plans. BlackRock analyst Robert Mitchnick noted that Bitcoin sentiment had shifted noticeably, with the asset decoupling from equities. However, momentum reversed on September 1 when ETFs saw $236.46 million in net outflows, the largest daily withdrawal since July 31.
This outflow followed $216.70 million in inflows on Monday, coinciding with Bitcoin dropping below $77,000 after trading above $80,000 in late August. Ether and XRP ETFs maintained stronger trends, with Ether ETFs extending their inflow streak to 12 sessions and XRP ETFs drawing $14.4 million. Bitcoin ETF net assets increased by 31% to $99.61 billion, and trading volume rose by 49% to $58.63 billion.
How the market reacted
Whalio's own Binance spot order flow for BTC, measured when this story was written up on 2 September 2026. Not the outlet's figures.
Whalio data shows Bitcoin trading at $77,439.00 with a 24-hour buy ratio of 50.4%, indicating balanced market participation. Shorter timeframes show slightly weaker sentiment, with buy ratios at 46.3% for 1 hour and 48.4% for 4 hours. The 1-hour volume delta is negative at -$1,635,315, and the 4-hour delta is -$5,806,725, suggesting immediate selling pressure. However, the 24-hour volume delta remains positive at +$10,575,840, showing that cumulative buying has outweighed selling over the full day. The Cumulative Volume Delta (CVD) closed at -$10,035,662, indicating that aggressive selling has slightly outweighed aggressive buying over the period. Net buying occurred for 13 out of 24 hours, with a total spot volume of $1,101,387,277 across 3,662,805 trades.
The latest daily buy ratio of 46.7% sits at the 18th percentile of the last 322 days, against a median of 49.2% - weaker buying than most days.
Was that an ordinary day?
The same Binance spot measurements for BTC, averaged over the days leading up to the story.
Over the preceding week, the average buy ratio was 49.3%, making today’s 24-hour ratio of 50.4% slightly higher by 1.1 points. Volume today was 0.91x the weekly average, indicating lighter trading activity than usual. The coin experienced net buying on only 3 of the past 7 days, with a total volume delta of -$107,307,292 over eight days. This contrasts with today’s positive 24-hour delta, suggesting a recent shift in short-term momentum. The price has declined 1.4% over the eight-day period, reflecting the broader weekly trend of outflows.