Initial public offerings in India could raise as much as $20 billion over the next 12 months, helping the country to cement its position as one of the world’s busiest listings markets, according to Citigroup Inc.IPOs have already fetched$12 billion in India this year, with another $5 billion set to be added this month alone thanks in part to Tata Capital Ltd. and LG Electronics Inc.’s Indian arm, which both start trading next week. “India is likely to be the world’s most active ECM market along with Hong K ...