Market ends lower amid choppy trading session: Benchmark indices ended marginally lower, amid volatile trading session, weighed down by bank shares while caution prevailed ahead of expiry of March derivative contracts on Thursday. The 30-share Sensex ended down 30 points at 28,162 and the 50-share Nifty dipped 8 points at 8,543. Markets will remain volatile as traders will unwind positions due to derivative expiry of March contract and fiscal-year profit booking. The next major trigger for the Indian markets is Q4 results of India Inc. which will start during second week of April, 2015. In the currency front, continuing its rising streak for the seventh straight session, the rupee rose by 9 paise to 62.18 against the dollar at the Interbank Foreign Exchange on sustained selling of dollars by exporters.