The Sensex is now down 477 points at 10,462.Tata Motors has tumbled over 10% to Rs 763. Wipro has slumped nearly 10% to Rs 443, and ONGC has plunged nearly 9% to Rs 1,176.Out of 2,350 stocks traded so far, 2,110 have declined, 212 have advanced and 28 are unchanged today.
