The Indian equity benchmarks advanced for second straight session on Tuesday led by gains in Reliance Industries, Tata Steel, ICICI Bank, Infosys, Bajaj Finance, State Bank of India and Kotak Mahindra Bank. The benchmarks staged a gap up opening and turned rangebound later in the day to rebound in last hour of trade. The Sensex rose as much as 420 points and Nifty 50 index touched an intraday high of 18,149.25.