Shares of Bharti Airtel plunged nearly 7 per cent Thursday ahead of announcement of its second quarter results. Erasing all its Wednesday's sharp gains, shares of the company Thursday ended 6.60 per cent down at Rs 295.85 on emergence of profit-booking at BSE. During the trade, it slumped 7.48 per cent to Rs 293.05. At NSE, shares of the telecom major tumbled 6.28 per cent to Rs 296. Following the sharp fall in the stock, the company's market valuation got eroded by Rs 8,354.57 crore to Rs 1,18,263.08 crore on BSE.