Microsoft Stock After Hours on December 9, 2025: AI Megaspending, Office Price Hikes, and What to Watch Before the December 10 Open
Microsoft closed at $492.06 on December 9, up 0.2%, before slipping to $491.65 after hours. The company announced $23 billion in new AI infrastructure investments, including $17.5 billion for India and $14 billion for Canada. Traders positioned ahead of the December 10 Federal Reserve rate decision. Market cap stands near $3.85 trillion.