BUENOS AIRES (Standard&Poor's) April 25, 2008--Standard&Poor's Ratings Services said today that it revised its outlook on its sovereign credit ratings on the Republic of Argentina to negative from stable and affirmed its 'B+' long- and 'B' short-term ratings on the republic. Standard&Poor's also revised its outlook on its 'raAA' national scale rating on Argentina to negative from stable. The negative outlook reflects the government's rejection of policies to correct the country's overheating economy, signaled by the resignation of Economic Minister Martin Lousteau. According to Standard&Poor's credit analyst Sebastian Briozzo, the current policy mix increases the likelihood that inflation continues to accelerate, which will fray social cohesion and could lead to additional direct