Rarely do sophisticated money managers cater to the man on the street, but that's just what Christian Baha, founder of Monaco-based managed-futures fund Quadriga Group, aims to do with a new, 7,000-square-foot shop on Fifth Avenue in New York City. The Superfund Investment Center, as it is not-so-modestly named, opened last month with less fanfare than Baha had anticipated: Former U.S. president Bill Clinton...