Bitcoin ETFs record biggest weekly inflows since October 2025 at $2.4B

Spot Bitcoin [BTC] ETFs saw weekly inflows worth $2.4 billion on the week ending the 25th of September.

This marked their largest weekly inflow since October 2025, which was strong enough to reverse their previously negative performance for 2026.

With this, Bitcoin ETFs were also able to push their year-to-date net flows to approximately $934 million positive.

Bitcoin ETF weekly update

According to Farside Investors, between the 21st and 25th of September, BTC ETFs recorded strong but gradually declining inflows.

That said, the total net inflows peaked at $999 million on the 21st of September, led by BlackRock’s IBIT with $381.4 million.

Fidelity’s FBTC followed the lead with $238.8 million, and ARKB joined the trail with $289.1 million in inflows.

Needless to say, inflows remained strong on the 22nd of September at $714.7 million, before falling to $346.9 million on the 23rd of September, $190.7 million on the 24th of September, and $134.5 million on the 25th of September.

Weak macroeconomic conditions do not add up

Interestingly, this happened despite a weak macroeconomic backdrop, which remained challenging for Bitcoin.

According to AMBCrypto’s previous report, the U.S. 10-year Treasury yield climbed to around 5.12% on the 23rd of September, its highest level since 2007, even as Bitcoin moved above $87,000.

At the same time, the Fed’s hawkish stance, persistent inflation concerns, and stronger September PMI data increased expectations of another rate hike.

Needless to say, all these factors have the potential to keep financial conditions tight and reduce liquidity available for riskier assets such as Bitcoin. For its part, falling Brent crude prices below $100 offered some potential relief on inflation, but oil remained elevated.

Yet, despite these headwinds—and the CLARITY Act’s failure to advance—Bitcoin still recovered from around $75,000 to above $87,000. And this was only possible because of the strong demand for Bitcoin ETFs.

Roadblocks remain

However, the current market conditions are raising red flags as Bitcoin’s price was was trading at $82,956.98 at press time after a drop of 2% in the past 24 hours.

Meanwhile, the Bitcoin exchange netflows chart highlighted a negative netflows streak, indicating that more BTC was moving out of exchanges than into them during this period.

But this in a practical sense is a good sign, as such withdrawals do reduce the amount of Bitcoin immediately available for selling.

Altcoin ETF past week performance

While all this was happening around Bitcoin ETFs, other altcoin ETFs also remained positive in the past week.

Ethereum [ETH] ETFs recorded $689.88 million, Solana [SOL] ETFs followed with $188.22 million, while XRP ETFs attracted $75.59 million. Lastly, Hyperliquid [HYPE] ETFs also recorded positive inflows of $9.25 million.

Overall, this shows that investor interest extended beyond Bitcoin, with Ethereum accounting for the largest share of the reported altcoin ETF inflows.

Final Summary

• The total net inflows peaked at $999 million on the 21st of September, led by BlackRock’s IBIT with $381.4 million.
• This happened despite a weak macroeconomic backdrop, which remained challenging for Bitcoin.