ISLAMIC FINANCE - Islam's inner friction

A firm in America has gained notoriety for launching the first hedge fund which it says is compliant with the shariah law that governs Muslims, even though short-selling is forbidden. Controversially it has also hired one of the world's few qualified shariah scholars as a full-time adviser. No one has been accused of cheating, but credibility and reputations are on the line. Chris Wright lifts the veil on a little-understood world.