After a highly volatile session, the 30-share index sank 900.29 points to 39,805.61.
Similarly, the 50-share NSE Nifty plunged 248.05 points to 11,714.05.
ITC was the top laggard in the Sensex pack, tanking 6 per cent, followed by HDFC, L&T, SBI, ICICI Bank and ONGC.
On the other hand, TCS, HUL, Tech Mahindra and Infosys bucked the market trend to trade with gains. ANS ABM ABM