Indian stock markets opened on a positive note today, buoyed by optimism about a potential year-end rally.

The Nifty 50 index opened at 23,801.40, gaining 51.20 points, or 0.22 per cent, while the BSE Sensex rose 135 points, or 0.17 per cent, to reach 78,607.58 points at the start of the trading session.