MKT 'MAY'HEM: SENSEX DOWN 477pts

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.