The Indian equity benchmarks gained for the second straight session on Tuesday led by gains in HDFC, HDFC Bank, Bharti Airtel, Infosys, ICICI Bank, and Ultratech Cement. The Sensex rose as much as 408 points and the Nifty 50 index touched an intraday high of 17,344. For the most part of the day, benchmarks traded in a rangebound manner but gave a breakout on the upside in the last hour of trade paced by the recovery in the gauge of banking stocks.