They also attract investors keen to buy into fast-growing industries: in February Kohlberg Kravis Roberts, a private-equity firm, invested a further $250m in Bharti Infratel.

• 他们还能够使投资者乐于买进这些快速发展行业的股票：今年2月，一家私募基金公司KohlbergKravisRoberts对BhartiInfratel追加了2.；5亿美元的投资。