The Sensex has slipped deeper into red and is now down 459 points at 19,792.The NSE Nifty has shed 166 points at 5,908.Reliance Communications and HDFC Bank have tumbled nearly 6% each to Rs 732 and Rs 1,682, respectively.Tata Steel and Hindalco have plunged nearly 5% each to Rs 811 and Rs 188, respectively. NTPC has shed 4.5% at Rs 262.BHEL and DLF have slipped 4.3% each to Rs 2,312 and Rs 1,126, respectively.Tata Motors and Reliance Energy have dropped 4% each to Rs 737 and Rs 2,268, respectively.Maruti has declined 3.5% to Rs 837. ITC, HDFC and Reliance are down around 3% each to Rs 209, Rs 2,811 and Rs 3,067, respectively.TCS has advanced 1.6% to Rs 953.