NY -- Standard&Poor's CreditWire 9/10/98 -- Standard&Poor's today affirmed its double-'B'-minus rating on the Federative Republic of Brazil's US$58 billion of long-term senior unsecured foreign currency debt and its double-'B'-plus/single-'B' ratings on the Republic's R296 billion (US$254 billion) of long- and short-term real-denominated debt. Additionally, Standard&Poor's affirmed its double-'B'-minus long-term foreign currency and its double-'B'-plus long-term local currency sovereign credit ratings on the Republic. The rating outlook has been revised to negative. The negative outlook indicates that if current negative trends continue, the ratings could potentially be revised downward over a one to three year time horizon. At the same time, Standard&Poor's affirmed its double-'B'-minus counterparty credit rating on Banco Nacional de