Strategy (MSTR) Stock After Hours (Dec. 12, 2025): Nasdaq-100 Risk, MSCI Index Threat, and What to Watch Before the Next Market Open
NEW YORK — December 12, 2025 — Strategy Inc. (NASDAQ: MSTR)—the company formerly known as MicroStrategy—ended Friday’s session under pressure and traded slightly lower after the closing bell, as investors weighed a fresh wave of index-related uncertainty and the company’s continued identity shift into a Bitcoin-heavy “digital asset treasury” model. Reuters+1 Below is what happened after the bell on 12/12/2025, what drove the conversation on 12/12/2025, and what matters most before the next U.S. stock market session (note: Dec. 13, 2025 is a Saturday, so U.S. exchanges are closed; the next regular open is Monday, Dec. 15, 2025). Reuters+1 Strategy