The Indian equity benchmarks dropped on Friday as investors turned to profit booking after benchmarks surged to highest levels in over five months, analysts said. The Sensex fell as much as 970 points and Nifty 50 index dropped below its important psychological level of 17,600 dragged by losses in Reliance Industries, Infosys, HDFC Bank, Tata Consultancy Services, HDFC, Mahindra & Mahindra and Larsen & Toubro.