Bitcoin ETF Outflows Hit $390M as Miner Selling Blocks BTC Breakout, Wintermute Warns

US spot Bitcoin ETFs shed $389.7 million for the week ended August 14, 2026 — their steepest seven-day exodus in six weeks, with Fidelity's Wise Origin Bitcoin Fund absorbing the deepest single-fund losses — all while the same miners whose selling is capping Bitcoin's recovery are racing to convert their power plants into AI data centers.

Trading firm Wintermute, in a market update published August 19, identified the dynamic that explains why Bitcoin failed to break above $65,000 even as July's inflation data came in soft and rate-hike odds fell: ETF redemptions and miner selling have formed a simultaneous supply-side pincer that "leaves the market without a strong source of fresh demand," the firm said. "An asset that cannot rally on good news while its dedicated vehicles bleed is telling us the marginal seller is back," Wintermute's August 19 market update stated.

The week's outflows reversed a strong August start that had produced $521.5 million in net inflows over the month's first four sessions.

Which Funds Bled Most

Four of the five sessions ended in negative territory. Monday set the tone, with $144.67 million leaving the complex in a single day — erasing most of the prior Friday's gains in one session.