Sri Lanka's stock market fell more than 2.5 percent in early trade on Monday, on panic selling after the arrest of a Sri Lankan-born hedge fund manager in New York on insider trading charges. Billionaire Galleon Group hedge fund founder Raj Rajaratnam and executives from other U.S. companies were charged on Friday with the largest hedge fund insider-trading scheme ever in the United States.<br/><br/>Rajaratnam is one of the biggest single investors on the Colombo Stock Exchange and has large stakes in some of Sri Lanka's blue chip shares. Monday’s session was the first on the Sri Lankan bourse since his arrest.<br/><br/>