The 30-share barometer, which had gained 183.24 points on Friday, rose further by 52.65 points, or 0.28 per cent, to 18,815.39.
Similarly, the wide-based National Stock Exchange index Nifty moved up by 9.75 points, or 0.17 per cent, to 5,713.05.
The trading sentiment remained firm on continued buying by funds and retail investors mostly on hopes that the government will bring in more economic reforms to boost the economy, market experts said.
They said, however, profit-booking in some counters by speculators and absence of cues from the Asian region as most of the markets are closed for a public holiday, capped the gains.
Meanwhile, Japan's Nikkei was down by 0.62 per cent in early trade today.
