On Thursday, the benchmark indices were trading in the red with the Sensex down around 145 points or 0.20% at 77,191, while the Nifty-50 was down around 34 points or 0.14% at 23,482. About 2,257 shares have advanced; 1,225 declined and 161 are unchanged on the BSE. Top gainers and losers on the BSE Sensex …