On Thursday, the benchmark indices were trading higher with the Sensex up around 20 points or 0.02% at 71,515 while the Nifty-50 up around 10 points or 0.04% at 21,152. About 2,349 shares have advanced, 1,188 declined, and 147 are unchanged on the BSE. Top gainers and losers on the BSE Sensex index are as …