This in itself is a no go for the current capitalist/interest based financial system of Wall Street (as well as all over the globe). Anyone who will try to bring this system into play will likely be setup for failure even before they start. The supports and benefactors of current financial system will never let it take off. Though there are indexes such as Dow Jones Islamic Index etc, but any large scale change is not possible at this time. Current financial system puts itself ahead of its clients, gambles with others money, and is beyond the reach of any law on the planet earth. It’s only agenda is to amass as much wealth as possible, it’s a conscience-less, ethic-less system driven by greed of amassing more wealth next quarter than the previous one, ad infinitum. It’s a corrupt system that cannot be replaced in the near term as those who benefit from this system have their roots deeply entrenched in all section of governance. You can find these people/organizations and their sympathizers (with conflict of interest – like shareholders, ex-employees, etc) deeply entrenched in executive, judicial, and legislative branches of government. It’s not possible for anyone to stand against them and survive.