Bitcoin ETF Flows — Spot BTC ETFs Add Just $5.06M on Oct. 15 as October Outflows Near $535M — IBIT Only Fund Buying

U.S. spot Bitcoin ETFs recorded net inflows of $5.06 million on Thursday, October 15, according to SoSoValue data, a figure that snapped a one-day outflow but was the smallest daily inflow of the month. The inflow was narrow. Of the 12 funds, only IBIT recorded an inflow, taking in $16.79 million. Two funds posted outflows, and the remaining nine were flat. Trading volume reached $2.28 billion, indicating that buyers and sellers largely offset each other. The inflow followed a $261.46 million outflow on October 14, the second-largest of the month, and across the two sessions the funds lost a net $256.4 million.

October has been a difficult month for the category. Inflows of $292.5 million in the first two sessions were reversed by heavy outflows on October 7 ($487.1 million) and October 8 ($244.1 million). Across 11 sessions, net October outflows total about $535 million. Six sessions were positive and five negative, but the average outflow day ($229.6 million) was more than double the average inflow day ($102.3 million). From Monday, October 12, through Thursday, the funds lost a net $146.2 million.

Fund-level flows show a concentrated market. IBIT, with $66.21 billion in net assets and cumulative net inflows of $65.64 billion, holds about 63% of total spot Bitcoin ETF net assets. Fidelity's FBTC, with $14.62 billion in net assets, was the most volatile large fund this week, taking in $103.06 million on October 13 and losing $152.73 million on October 14. Morgan Stanley's new MSBT took in $6.67 million on October 13. Total net assets of $105.71 billion, down from $106.98 billion on October 13, reflect Bitcoin's price movements more than flows.

Macro conditions have driven the pattern. September PPI rose 1.3% for the month and 6.3% over 12 months, well above forecasts, and the 10-year Treasury yield rose to 5.33%, a two-decade high. According to the report, markets priced an 85% chance of a hold at the October 27–28 Federal Reserve meeting after Chair Kevin Warsh said he does not prejudge meetings. Technology equities have also sold off on AI-related debt concerns, and Bitcoin has traded closely with the Nasdaq.

The broader digital asset complex has also cooled. Spot Ether ETFs lost $885.4 million in October, with outflows on 10 of 11 sessions, while Spot Solana ETFs posted eight straight outflow sessions through October 14. Spot XRP ETFs were the exception, with inflows and no weekly outflow since the week ending July 10. Over the two years since launch, investors have put nearly $57 billion of net new money into spot Bitcoin ETFs, but the Q3 inflow of $6.34 billion has largely been given back in October, leaving 2026 year-to-date net inflows at a thin positive margin of roughly $160 million by the publication's calculation.