Indian equity benchmarks, the BSE Sensex and the Nifty 50 tanked over 3 per cent each in intraday trade on Monday, August 5, following the global sell-off after the concerns around US recession grew and rising tensions in the Middle East added to investors’ woes. The Sensex opened 2,400 points lower and Nifty slipped below the 24,300 level due to selling in heavyweights on Monday morning.