Paul Tudor Jones, the wealthy hedge fund manager, has become the latest in a growing band from his profession to throw their weight behind Barack Obama, the US senator vying for the Democratic presidential nomination. Mr Jones is said to be planning to host a 500-guest fundraiser for Mr Obama on May 19. The event will be held at Mr Jones’s seaside mansion in Greenwich, Connecticut, a big US centre for hedge funds. “The whole of Greenwich is backing Obama,” said one leading US businessman. Hedge fund managers, whose newly found wealth has made them attractive targets for presidential hopefuls,...