Indian benchmark indices opened on a weaker note as investors remained cautious amid ongoing tensions in West Asia, with the continued blockade at the Strait of Hormuz raising concerns over global energy supply.

At 9:36 hours, the 30-share benchmark index was trading at 77093.17 down by -570.83 points or by -0.73 % and then NSE Nifty was at 24091.1 down by -81.95 points or by -0.34 %.

Sensex touched intraday high of 77710.82 and intraday low of 77049.28 The NSE Nifty touched intraday high of 24206 and intraday low of 24079.75

The top gainers of the BSE Sensex pack were State Bank of India (Rs. 1096.35,+0.21%), UltraTech Cement Ltd. (Rs. 12165.30,+0.15%), Mahindra & Mahindra Ltd. (Rs. 3048.10,+0.06%), among others.

The top losers of the BSE Sensex pack were HCL Technologies Ltd. (Rs. 1234.30,-3.36%), Infosys Ltd. (Rs. 1204.10,-3.10%), Tata Consultancy Services Ltd. (Rs. 2470.80,-2.05%), Sun Pharmaceutical Industries Ltd. (Rs. 1650.75,-1.73%), Eternal Ltd. (Rs. 257.00,-1.12%), among others.

Realty index was at 6094.9 up by -6.35 points or by -0.1%. Godrej Industries Ltd. (Rs. 1805.00,+0.73%), Sobha Ltd. (Rs. 1431.80,+0.46%), Lodha Developers Ltd. (Rs. 860.00,+0.45%), Oberoi Realty Ltd. (Rs. 1714.25,+0.38%),.

The Market breadth, indicating the overall strength of the market, was weak. On BSE out of total shares traded 3458 , shares advanced were 1212 while 2081 shares declined and 165 were unchanged.