Islamic prohibitions against fixed interest and most complicated financial instruments have helped Islamic banks avoid the avalanche of derivative debt losses that have wreaked havoc across the world financial system.

Devout Muslim investors have also fared better when buying global equities that do not violate Islamic principles. Sharia screening has shielded them from exposure to over-leveraged corporates, conventional banks, gaming companies and sellers of alcohol such as hotel groups, all of which have suffered from precipitous drops in value.