The BSE Sensex stayed above the key 16,000 mark Tuesday as stocks gained momentum on the Dalal Street. At noon, it traded 117 points or 0.73% higher at 16,105, while the broader Nifty index advanced 40 points at 4,888.Asian stocks also extended gains supporting equities. The rupee, however, shed some gains and traded at 55.56 to the dollar. Falling crude prices and strength in the euro have led to the recovery in the currency.Banking...