London: Billionaire financier George Soros is in discussion to buy a stake of 4 percent in the Bombay Stock Exchange (BSE). According to people involved in the matter, it is a part of Soros' current interest in rising market shares. The federal regulators yet to approve the deal by Soros Fund Management, according to these people. According to Indian rules, foreign investors cannot buy stakes in local exchanges beyond 5 percent. Soros Fund Management, Soros' $27 billion firm, is also planning to purchase Dubai Holding's 4 percent stake for about $40 million. Soros and the team at his hedge fund have been cagey about U.S. and European investments. However, they have been optimistic towards emerging market shares. Dubai Holding owned by the emirate's ruler Sheikh Mohammed bin Rashid al-Maktoum, had been looking to exit the BSE, according to a report by the Financial Times.