Why Strategy Inc stock is jumping after-hours: fresh Bitcoin buy, $17.44B Q4 paper loss
New York, Jan 5, 2026, 17:27 ET — After-hours Shares of Strategy Inc (MSTR.O) rose 4.8% in after-hours trading on Monday after the company disclosed a fresh bitcoin purchase and flagged a $17.44 billion fourth-quarter unrealized loss on digital assets. SEC The disclosure matters because Strategy has become one of the market’s most direct equity proxies for bitcoin moves, with…