Besides, a firming trend on other Asian bourses also buoyed sentiment here.
The 30-share barometer, after spurting to 27,459.75 at the outset, was trading 106.92 points, or 0.39 per cent, higher at 27,354.08 with all the sectoral indices, led by IT, teck, oil&gas and metal rising by up to 0.88 per cent.
The gauge had gained 520.57 points in previous three days.
The NSE index Nifty climbed 26.90 points or 0.32 per cent to 8,434.10.
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According to brokers, retail inflation easing further to multi-year low of 3.41 per cent in December too had a positive impact.
Shares of Infosys was trading lower by 0.60 per cent at Rs 994 apiece, reacting to Q3 earnings.
The IT major today reported a 7 per cent growth in its consolidated net profit at Rs 3,708 crore for the October-December quarter and revised its revenue guidance in constant currency to 8.4-8.8 per cent as against earlier 8-9 per cent.
Among other Asian markets, Japan's Nikkei rose 0.52 per cent while Hong Kong's Hang Seng was up 0.51 per cent in early trade. China's Shanghai Composite index gained 0.12 per cent.
The US Dow Jones Industrial Average, however, closed 0.32 per cent lower in yesterday's trade.