The stock exchanges are conducting a special live trading session today as the National Stock Exchange (NSE) is testing its software.
The sensex resumed slightly lower at 21,752.44 and moved in a range of 21,762.38 and 21,726.42 before quoting at 21,728.66 at 1130hrs, showing a loss of 25.09 points or 0.12 pct from its last close.
The NSE 50-share Nifty also moved down by 2.75 points 0.04 per cent to 6,490.45 at 1130hrs.
US stocks dropped yesterday pressured by a sell-off in the health-care sector, but major equity indexes still posted solid weekly gains.
Meanwhile, Foreign institutional investors (FIIs) bought shares worth a net Rs 4,222.10 crore yesterday as per provisional data from the stock exchanges.