The 30-share BSE index was trading 36.88 points or 0.07 per cent lower at 52,445.83 in initial deals. Similarly, the broader NSE Nifty inched 5.50 points or 0.03 per cent down to 15,716.
ONGC was the top loser in the Sensex pack, shedding around 5 per cent, followed by Sun Pharma, PowerGrid, Bajaj Finance, IndusInd Bank, Dr Reddy's and Maruti.
Reliance Industries Ltd (RIL), TCS, Hindustan Unilever Ltd (HUL), Infosys, Kotak Mahindra Bank and Bharti Airtel were the six winners on the top-10 chart
Similarly, the broader NSE Nifty rose 97.20 points or 0.73 per cent to an all-time closing high of 13,355.75. It touched its record intra-day peak of 13,366.65 in early trade.