Indian equity markets ended a volatile session marginally lower on Tuesday, with the Nifty 50 slipping 32.85 points, or 0.13 per cent, to 25,169.50, and the BSE Sensex falling 57.87 points, or 0.07 per cent, to 82,102.10, as investor sentiment remained cautious amid currency weakness and mixed sectoral moves.The rupee weakened to a record low of 88.62 against the U.S. dollar during the day, before settling at 88.75. The slide was driven by concerns over the recent U.S. visa fee hike and sustained outflows ...