Why stock market is falling today: Sensex falls over 400 pts; Nifty below 23,200

Indian stock markets declined due to drops in IT and banking stocks, with Infosys and Axis Bank reporting disappointing results. Other factors include concerns over US policy changes ahead of Donald Trump's inauguration, rising crude oil prices, a depreciating rupee, persistent FII selling, and global bond yield fluctuations, contributing to market uncertainty.