India’s benchmark stock market index, the Nifty, could climb to 28,000 by December 2027, representing a potential gain of around 12% from its current level, according to global brokerage firm Citi. India's benchmark Nifty could rise to 28,000 by December 2027, offering an upside of around 12 per cent from current levels, as improving corporate earnings, lower crude oil prices and a more.