The benchmark Sensex and the broader Nifty today jumped to new life highs of 33,326.29 and 10,381.95 respectively, with encouraging quarterly earnings sending out a positive signal among investors.
PSU, consumer durables, infrastructure and auto stocks remained in the lead. Positive Asian shares added to optimism.
Buying by domestic institutional investors (DIIs) lifted mood too, traders said.
The 30-share Sensex climbed 169.07 points, or 0.51 per cent, to scale a new high of 33,326.29, breaching its previous intra-day record of 33,286.51 hit on October 27.
All the sectoral indices led by PSU and infrastructure were trading in positive territory.
The 50-share NSE Nifty too rose 58.90 points, or 0.57 per cent, to scale a fresh lifetime high of 10,381.95, breaking its previous intra-day record of 10,366.15 touched on Friday.
Other Asian markets saw a firming trend as investors tracked a record closing on Wall Street on Friday.
Hong Kong's Hang Seng was trading higher by 0.06 per cent while Japan's Nikkei rose 0.35 per cent. Shanghai Composite, however, shed 0.09 per cent today.
The US Dow Jones Industrial Average closed 0.14 per cent higher on Friday.
(With PTI inputs)