Indian stock markets began trading on a positve note, tracking gains in global oil prices and optimism over US-Iran peace breakthrough. Sensex surged over 91 points to 76,101, while Nifty climbed 33 points to 23,951 in early trade. Bank Nifty outperformed with a jump of 15 points. Meanwhile, the rupee traded slightly weaker at 95.55 against the US dollar.