Just a year or two ago, the rise of Shariah bonds (sukuk) created the main tool by which Shariah was spread, particularly in the West.
Today, new, short-term instruments are broadening and deepening the Shariah market even more, thus facilitating the spread of Shariah through the financial back door…
Islamic equivalents to conventional financial instruments have been developing even in relatively obscure areas such as short-term interbank lending, trade financing and swaps.
https://gulfbusiness.com/2015/03/gulf-firms-go-islamic-markets-deepen/#.VRchmUIiplI
