The Nifty Pharma index emerged as the top sectoral gainer in Monday’s session, March 17, mainly led by gains in index heavyweights Dr Reddy’s Laboratories, Cipla, and Sun Pharma. The index gained as much as 1.9 per cent in early trade, however, it pared the initial gains in the second half to settle with a 1.56 per cent gain, closing at 20,703.95.