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U.S. Spot Bitcoin ETFs Post $146 Million in Net Outflows on May 8

Fidelity’s FBTC led withdrawals with $97.60 million in outflows, while Morgan Stanley’s MSBT was the top inflow contributor at $5.74 million.

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Fact Check
All key figures in the claim are strongly corroborated by multiple independent crypto news sources, all citing SoSoValue as the underlying data provider. The KuCoin article, Coinness article, BingX article, MEXC article, and AInvest article all confirm: (1) U.S. spot Bitcoin ETFs posted approximately $146 million in net outflows on May 8, 2026; (2) Fidelity's FBTC led withdrawals at $97.60 million; and (3) Morgan Stanley's MSBT was the top inflow contributor at $5.74 million. The minor discrepancy between the precise figure of $145.64 million (per Coinness/MEXC) and the rounded $146 million headline figure is a standard rounding convention and does not undermine the claim. The claim's description of MSBT as the 'top inflow contributor' is accurate given it was the only ETF with notable positive flows on that day.
Summary

U.S. spot Bitcoin ETFs recorded $146 million in net outflows on May 8, indicating a day of net investor withdrawals from the regulated fund segment that gives investors Bitcoin exposure through traditional stock market products. Fidelity’s FBTC posted the largest single outflow at $97.60 million, while Morgan Stanley’s MSBT led inflows with $5.74 million. Total net assets across the category stood at $106.61 billion, and cumulative net inflows reached $59.34 billion.

Terms & Concepts
  • Spot Bitcoin ETF: An exchange-traded fund that holds Bitcoin directly, giving investors market exposure without requiring them to custody the asset themselves.
  • Net outflows: The amount by which investor withdrawals exceed new investments over a given period.
  • Net assets: The total market value of assets held by a fund or group of funds after accounting for their current holdings.