The S&P BSE benchmark recovered by mere five points in the late morning trade after initial weakness in view of mild buying, mainly in metal, realty, auto and consumer durable sectors, on the back of persistent foreign capital inflows.
The Sensex resumed lower at 20,228.76 and hovered in a range of 20,211.79 and 20,323.77 before quoting at 20,254.16 at 1030 hrs, showing a marginal gain of 4.90 points or 0.02 per cent from its last close.
The NSE 50-share Nifty also moved up by 7.90 points or 0.13 per cent to 6,015.35 at 1030 hrs.
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However, HDFC dropped by 1.25 per cent followed by ICICI Bank at 0.96 per cent, Sun Pharma at 0.87 per cent and Reliance Industries at 0.69 per cent.
Tata Steel extended Wednesday's gains triggered by the company's announcement of increase in production and sales deliveries of steel in Q2 of 2013.
Foreign institutional investors (FIIs) bought shares worth a net Rs 326.58 crore yesterday as per provisional data from the stock exchanges.
Asian markets were trading mixed in their early trade. Key benchmark indices in Singapore, Japan and Indonesia rose by 0.44 per cent to 0.77 per cent while indices in China, Hong Kong and South Korea fell by 0.01 per cent to 0.88 per cent.