The Sensex has dropped 500 points to 17,640.Reliance has declined over 4% to Rs 2,445. L&T is still down nearly 4% at Rs 3,639. NTPC has slipped 4% to Rs 209. RCom has dropped 4% to Rs 652. Hindalco has declined nearly 5% to Rs 165.ITC has slipped over 3% to Rs 193.ICICI Bank and Infosys are still down over 2.5% each.Declining shares are ahead of advances - out of 2,800 scrips traded, 1,700 have declined.