The Indian equity benchmarks surged on Friday mirroring gains in global markets. The Sensex rose as much as 645 points and Nifty 50 index reclaimed its important psychological level of 15,700 led by gains in index heavyweights like Reliance Industries, HDFC Bank, ICICI Bank, Hindustan Unilever, Infosys, HDFC, Kotak Mahindra Bank and Bharti Airtel. Stocks and bonds were both headed for their first weekly gain in a month on Friday as investors wagered on central banks bringing inflation to heel, though growth fears dragged on commodities.