Indian equity benchmarks gave up their two-day rebound on Tuesday, erasing investors' gains amid sustained selling in IT stocks. Sensex ended 1,068.74 points lower at 82,225.92, while the Nifty 50 settled at 25,424.65, down 288.35 points. Among sectors, the IT index was the worst hit, plunging over 4%, followed by Nifty Midsmall IT and Telecom and Nifty Realty indices.