Sensex tumbles over 300 points, Nifty slips below 18,200

The 30-share index was trading 306.32 points or 0.50 per cent lower at 60,837.01 in initial deals. Similarly, the Nifty fell 89.50 points or 0.49 per cent to 18,121.45. ICICI Bank was the top loser in the Sensex pack, shedding around 2 per cent, followed by Tata Steel, ITC, SBI, HDFC and Titan.