The National Stock Exchange of India Ltd. is winning bullish backing from Wall Street brokers, as they expect the bourse’s dominance to gain in India’s deepening capital markets.Morgan Stanley and JPMorgan Chase & Co. have initiated coverage of NSE’s stock with overweight ratings, even as it has mostly traded below its initial public offering price since listing in September. India’s 360 ONE Capital Markets Pvt. also recommends buying the stock.The optimism reflects confidence in the structural expansion of India’s capital markets despite near-term concerns over slowing derivatives growth.