The Sensex has slipped deeper into red and is now down 199 points at 18,403.Reliance Energy has slumped 5.6% to Rs 1,598. Reliance Communications and NTPC have plunged 4.3% each to Rs 652 and Rs 229, repsectively.BHEL has dropped 3.5% to Rs 2,400. DLF and Larsen & Toubro have slipped over 3% each to Rs 842 and Rs 3,980, respectively.HDFC has shed 2% at Rs 2,550. ACC and Mahindra & Mahindra are down 1.7% each at Rs 1,061 and Rs 696, respectively.