Data from SoSoValue shows that US spot Bitcoin ETFs attracted $998.95 million in net inflows during trading on Monday, September 21, 2026. This influx not only surpassed the previous 2026 peak of $844 million set on January 14, but also marked the largest single-day capital surge since October 6, 2025 - the same day Bitcoin reached its all-time high near $126,200.
Defying Interest Rate Sentiment
The massive buying spree came just days after the US Senate failed to pass the CLARITY Act and the Federal Reserve decided to hike interest rates once again. The market shrugged off these macro headwinds, logging a three-day streak of ETF inflows - the longest run of positive flows in the past two weeks.
Throughout September, Bitcoin ETFs have taken in $1.31 billion in inflows, following August’s haul of $3.52 billion. Even so, year-to-date cumulative flows for US spot Bitcoin ETFs remain in negative territory, sitting at $464 million in net outflows.
Bull Market Confirmation Signal
The influx of Wall Street capital had an immediate impact on spot trading desks. Bitcoin surged to touch $87,200 on Monday before cooling off to settle around $85,430. This marked a 4.7% gain over the last 24 hours and brought its 30-day growth to 12.3%.
So far this quarter, Bitcoin has jumped 44% toward $85,000, outperforming all major global assets, including gold. CryptoQuant analyst Julio Moreno noted that Bitcoin is now trading above its 365-day moving average - a threshold he described as the final confirmation signal of a new bull market.
Ethereum Joins the Inflow Wave
Institutional buying appetite on Monday was not limited to Bitcoin. Spot Ether ETF products also logged $270 million in net inflows on the same day. Similar to Bitcoin, this figure represented Ethereum’s largest single-day capital intake throughout 2026.
A similar trend was not seen with XRP. Spot XRP ETFs recorded neither net inflows nor outflows at the start of the week. Despite staying flat over the past 24 hours, XRP ETF products had previously accumulated total net inflows of $1.71 billion.
A billion dollars once again found its way into crypto just as US macroeconomic policy hurdles appeared to be mounting. Institutional investors seem no longer willing to wait for regulatory green lights before expanding their market positions. Reported by Cointelegraph.
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Disclaimer: This article is for informational and educational purposes only, not financial advice. Cryptocurrency assets are highly volatile and carry significant risk. Always do your own research (DYOR) and never invest more than you can afford to lose.
