Indian stock markets, including the Sensex and Nifty 50, reached record highs on Friday, extending gains into the new year. The Sensex closed up 0.67% at 85,762.01, while the Nifty 50 ended at a record 26,328.55, up 0.70%. Broader indices like the BSE Midcap and Smallcap also saw significant gains, indicating strong market breadth with energy, realty, and metal stocks leading the advance.