On Wednesday, the benchmark indices were trading lower with the Sensex down around 831.50 points or 1.14% at 72,297.27while the Nifty-50 down around 239.35 points or 1.09 at 21,793. About 1,338 shares have advanced, 1,777 declined, and 92 are unchanged on the BSE. Top gainers and losers on the BSE Sensex index are as follows: …