Bitcoin ETF Inflows Rebound to $1.27B as IBIT Leads
US spot Bitcoin ETFs recorded $433.03 million in net inflows on 18 September 2026, marking a second consecutive positive session. Fidelity’s FBTC led that day with $310.72 million, while BlackRock’s IBIT attracted $108.44 million. US spot Ether ETFs separately recorded $144.8 million in inflows.
On 21 September, combined Bitcoin ETF and Ether ETF inflows rose to $1.269 billion. IBIT led Bitcoin ETF demand with about $618 million. The rebound followed a weak week in which Bitcoin ETF inflows were estimated at only $6.2 million. Cumulative Bitcoin ETF inflows since January 2024 reached roughly $55 billion to $55.8 billion, while assets under management exceeded $102.5 billion and may have approached $105.6 billion.
Bitcoin traded above $81,000 and briefly neared $82,000. Sustained Bitcoin ETF inflows could create direct spot-market buying pressure and support institutional demand. However, traders should monitor whether flows continue, whether BTC holds $81,000, and how macroeconomic conditions, liquidity and derivatives positioning affect price action.
Bullish
The sharp increase in Bitcoin ETF inflows, led by IBIT, signals renewed institutional demand after a weak preceding week. Such flows can translate into spot-market buying and may support BTC in the short term, particularly while Bitcoin remains above $81,000 and approaches $82,000. The separate Ether ETF inflows also indicate broader demand for regulated crypto investment products.
Over the longer term, cumulative Bitcoin ETF inflows of roughly $55 billion to $55.8 billion and assets above $102.5 billion strengthen the ETFs’ role as an institutional access channel. However, the bullish effect depends on sustained inflows. Traders should watch for a reversal in daily or weekly flows, resistance near $82,000, support around $81,000, macroeconomic developments, derivatives positioning and overall liquidity. If ETF demand fades, the initial bullish signal may weaken and volatility could increase.