iShares MSCI Turkey ETF (NYSEArca: TUR)
April gain: 12.8%
Comment: TUR’s place on this list is something of a surprise due to Turkey’s deep trade and business ties to Russia, but the ETF has surged nonetheless. Still, there are signs investors are leery about TUR’s ability to keep climbing in the face of geopolitical headwinds. Last week, investors pulled $18 million from the fund.