The Sensex opened almost flat at 20,033 - up two points - but slipped soon on the back of weak global cues.
A heavy bout of selling in the late noon deals saw the index plunge to a low of 19,177 - down 856 points from the day's open.
The Sensex finally ended with a huge loss of 769 points (3.8%) at 19,261.
The market breadth was fairly negative at close - out of 2,954 stocks traded, 1,939 declined, 999 advanced and 16 were unchanged today.
INDEX DRAGGERS
DLF and NTPC slumped over 7% each to Rs 944 and Rs 229, respectively.
Tata Steel and HDFC plunged 6% each to Rs 824 and Rs 2,878, respectively.
ONGC and Tata Motors tumbled 5.8% each to Rs 1,166 and Rs 701, respectively.
Hindalco and Reliance Communications shed 5.5% each at Rs 201 and Rs 718, respectively.
BHEL and Bharti Airtel dropped over 5% each to Rs 2,425 and Rs 905, respectively.
SBI, Ranbaxy and Reliance declined around 4% each to Rs 2,315, Rs 406 and Rs 2,778, respectively.
ICICI Bank and TCS slipped 3.3% each to Rs 1,167 and Rs 1,010, respectively.
Hindustan Unilever was the sole gainer at Rs 219 - up nearly 1%.
MOST ACTIVE COUNTERS
IFCI topped the value chart with a turnover of Rs 457.70 crore followed by Ispat Industries (Rs 309.50 crore), Kolte Patil (Rs 287.60 crore), HDFC (Rs 204.55 crore) and Reliance Petroleum (Rs 196 crore).
G V Films led the volume chart with trades of around 5.05 crore shares followed by IFCI (3.97 crore), Harig Cranks (3.81 crore), Ispat Industries (3.70 crore) and Bellary Steel (2.60 crore).