Home to tame inflation, favorable tax rates and a new reform-minded president, it is not surprising that some noteworthy investors are bullish on Mexican sovereigns . As one example of a reason why Mexican corporates are worth a look, Standard & Poor's recently revised its outlook on Mexico's state-run oil giant Petróleos Mexicanos, or Pemex, and that could prompt a credit rating upgrade sometime in the next 18 months. Harper also notes the improving U.S. economy and government reforms initiated by President Enrique Peña Nieto as potential catalysts for Mexican corporates.