The Indian equity benchmarks extended losses after staging a gap down opening on Monday dragged by losses in index heavyweights like HDFC twins, Infosys, ICICI Bank, Larsen & Toubro, Kotak Mahindra Bank, Bajaj Finance and Hindustan Unilever amid weak global cues. The Sensex fell as much as 1,155 points and Nifty 50 index broke below its important psychological level of 17,200.