The stock market opened to a great start on Monday as the BSE Sensex hit an all-time high of 35,612.11 points, while the broader NSE Nifty soared to a new high of 10,906.85 in the morning trade.
A Rs 37,000 crore mega-deal with HPCL lifted the Oil and Natural Gas Corporation (ONGC) shares by 5%.
Gains were led by Reliance Industries and HDFC Bank.
At 11.59 a.m., the 30-share BSE index Sensex was up 91.51 points or 0.26% at 35,603.09.
Asian stocks were trading mixed as investors kept an eye on political developments in the United States after a government shutdown began last week.
However, the U.S. stocks on Friday finished higher, with both the S&P 500 and the Nasdaq ending at records as optimism over corporate earnings outweighed the U.S. government shutdown.