...OVERVIEW + Brazil faces challenging political and economic circumstances despite what we consider to be a significant policy correction during President Dilma Rousseff's second term. + The number of investigations of corruption among certain politicians and companies is increasingly weighing on Brazil's fiscal and economic outlook, putting at risk effective policy implementation, particularly in Congress. + We revised our outlook on the foreign-currency ratings on Brazil to negative to reflect what we believe is a greater than one¡in¡three likelihood that the policy correction will face further slippage given fluid political dynamics and that the return to a firmer growth trajectory will take longer than expected. + In addition, we affirmed our '###-' long-term foreign-currency sovereign credit rating and '###+' long-term local-currency sovereign credit rating on Brazil. NEW YORK (Standard & Poor's) July 28, 2015--Standard & Poor's Ratings Services said today that it revised its outlook...