Mumbai, Oct 10: The Bombay Stock Exchange (BSE) benchmark Sensex on Friday tumbled by nearly 10 per cent to 10,239.76 in opening trade.

The 30-share index, which had nearly lost 1,730 points in the past five straight sessions, plunged by 1,088.60 points, or 9.8 percent, little away from hitting the lower level circuit of 10 per cent, fixed by authorities.

The National Stock Exchange (NSE) index Nifty moved down by 314.70 points, or 9 per cent to 3,198.95 with all the heavy-weight stocks trading in negative zone.

Infosys Technologies fell by Rs 54.35 at Rs 1,200 despite better quarterly earnings.

Besides, other losers were Reliance Industries, Reliance Infra, RCom, ICICI Bank, State Bank of India, Bharti Airtel, Satyam Computers, Tata Consultancy, Wipro, BHEL, Larsen and Toubro, Grasim Industries, HDFC Ltd and ACC. (ANI)