Strategy Inc (MSTR) Stock After Hours Dec. 19, 2025: MSCI Index Risk, Bitcoin Rebound, and What to Watch Before the Next Market Open
Strategy Inc (NASDAQ: MSTR) — the company formerly known as MicroStrategy — finished Friday, December 19, 2025 with a strong rebound in the regular session, then held most of those gains in after-hours trading as investors weighed a Bitcoin bounce against a fresh index-related headline that could matter far more than a single day’s price action. Investing.com+1 MSTR closed the day at $164.58 (+4.01%) and traded around $165.04 in after-hours (+0.13%) as of 7:59 p.m. ET, after swinging through a $161.63–$167.75 range during the regular session. Investing.com One calendar note matters for readers outside the U.S.: “tomorrow” is Saturday (Dec.