The Sensex is now down 51 points at 19,915.Hindustan Unilever and Tata Motors have shed 2.5% each at Rs 203 and Rs 751, respectively.NTPC and Mahindra & Mahindra have slipped 2% each to Rs 241 and Rs 765, respectively. BHEL and TCS have shed 1.8% each to Rs 2,693 and Rs 1,043, respectively.ONGC and Reliance Energy have dropped 1.3% each to Rs 1,174 and Rs 1,906, respectively.Cipla and Reliance Communications are down 1% each at Rs 195 and Rs 726, respectively.Out of 2,743 stocks traded so far, 1,901 have advanced, 806 have declined and 36 are unchanged.