PARIS (Standard&Poor's) Dec. 2, 2010--On November 30, Standard&Poor's Ratings Services placed its 'A-' long-term and 'A-2' short-term sovereign credit ratings on Portugal on CreditWatch with negative implications. We believe that the sovereign CreditWatch listing, together with the fiscal drag from 2011 budgetary cuts and the downward revision in our 2011 growth projection, could have a negative impact on the creditworthiness of Portugal-based REN-Redes Energeticas Nacionais, SGPS, S.A. (A-/Negative/A-2); EDP - Energias de Portugal, S.A. (A-/Negative/A-2); Comboios de Portugal, E.P.E (BBB+/Watch Neg/--); Rede Ferroviaria Nacional REFER, E.P.E. (BBB+/Negative/--); Metropolitano de Lisboa, E.P. (ML; BBB+/Negative/--); and PARPUBLICA - Participacoes Publicas (SGPS), S.A. (BBB+/Watch Neg/--). We expect to publish a more detailed analysis of the effects of our sovereign