Equity benchmark indices climbed in early trade in a special trading session on Saturday, extending their rally to the third day running, amid fresh foreign fund inflows. The 30-share BSE Sensex climbed 158.01 points to 74,075.04 in early trade. The NSE Nifty went up by 53.75 points to 22,519.85. BSE, NSE Special Trading Session on May 18: Both Sensex, Nifty Climb in Early Trade Amid Fresh Foreign Fund Inflows.