Authorities on Monday arrested the chief executive of a private New York financing firm on suspicion of running a purported Ponzi scheme that attracted $400 million in investments, U.S. law enforcement officials said. Nicholas Cosmo, head of Agape World Inc on New York's Long Island, was said to provide commercial bridge loans, but was instead operating a traditional Ponzi scheme in which early investors are paid with the money of new clients, officials said. "Nicholas Cosmo took the advice of an attorney and complied with an arrest warrant," said Al Weissmann, spokesman for the U.S. Postal Inspection Service, which is...