On Tuesday, the benchmark indices were trading lower with the Sensex down around 505 points or 0.70% at 71,774 while the Nifty-50 down around 138 points or 0.63% at 21,605. About 1,470 shares have advanced, 2,063 declined, and 147 are unchanged on the BSE. Top gainers and losers on the BSE Sensex index are as …