Strategy Inc (MSTR) Stock Drops After $980M Bitcoin Buy: SEC Filing Details, Nasdaq 100 Impact, and Wall Street Forecasts (Dec. 15, 2025)
December 15, 2025 — Strategy Inc. (Nasdaq: MSTR)—the company formerly known as MicroStrategy—was back in the spotlight Monday after disclosing another near–$1 billion Bitcoin purchase. The twist: despite the buying spree, Strategy stock fell sharply alongside Bitcoin, underscoring the market’s growing focus on how the company funds its crypto accumulation—and what index providers may do next. As of late Monday trading, MSTR was around $164, down roughly 7% on the day, while Bitcoin traded near $86,200, down roughly 3%. What happened on Dec. 15: Strategy discloses another 10,645 BTC purchase In a Form 8‑K filed December 15, Strategy reported that