On Thursday, the benchmark indices were trading in the red with the Sensex down around 520 points or 0.72% at 72,948, while the Nifty-50 was down around 161 points or 0.72% at 22,141. About 1,444 shares have advanced; 1,901 declined and 179 are unchanged on the BSE. Top gainers and losers on the BSE Sensex …