Domestic equity benchmarks Sensex and Nifty slipped today by 42.25 and 16.50 points, respectively in the first half of the session. Most of the nifty indices have weakened today, except for Nifty Pharma and Nifty Healthcare, which surged by 1.15 and 1.25 per cent respectively. The Nifty Metal index has dropped the most by 1.19 per cent.