New Delhi, July 24 -- The Indian stock market traded sharply lower on Thursday, reversing previous sessions' gains, dragged by heavy selling in IT, FMCG, realty and banking stocks. The benchmark Sensex slumped over 600 points, while the Nifty 50 was down over half a percent, holding above the 25,000 level.

Nestle India, Trend, Shriram Finance, Tech Mahindra, NTPC and HCL Technologies were the top losers among the Nifty 50 constituents.

In the previous session, the equity market witnessed strong gains, and the Nifty 50 closed above 25,200 level. The Sensex surged 539.83 points, or 0.66%, to close at 82,726.64, while the Nifty 50 settled 159.00 points, or 0.63%, higher at 25,219.90.

The highest Nifty Open Interest (OI) on the Call side i...