After a weak start in 2014, enthusiasm for Mexico, which passed a landmark energy reform and is undergoing anti-trust reforms in the communications industry, is fizzling out. Year-to-date, the iShares MSCI Mexico Capped Index (EWW) lost 6.9%, while the iShares MSCI Brazil Capped ETF (EWZ) rewarded investors with 5.3%. Analysts have scaled back thei…