Istanbul's financial district, the Levent district, which comprises of leading Turkish companies' headquarters and popular shopping malls, is seen from the Sapphire Tower in Istanbul April 10, 2015. Turkish President Tayyip Erdogan dreams of transforming Istanbul into a financial hub that can rival Dubai or Singapore, but first he needs to win over would-be investors. Market participants say interest from small investors is on the wane, thanks to higher fees and as new flotations fail to spark interest. That's bad news for an exchange that relies on retail investors for much of its liquidity. It also raises questions about the viability of the government's drive to make Istanbul a global top-10 financial hub. Picture taken April 10, 2015. REUTERS/Murad Sezer