After rallying last year, European stocks and the related exchange traded funds are disappointing investors in 2018. For example, the SPDR EURO STOXX 50 (NYSEArca: FEZ) is lower by nearly 7% while the SPDR STOXX Europe 50 ETF (NYSEArca: FEU) is off by a comparable amount. The $3.44 billion FEZ...