NY -- Standard&Poor's CreditWire 4/17/96 -- Standard&Poor's today has assigned its double-`B' rating to the United Mexican States' (UMS) U.S. dollar global bond due May 15, 2026, launched today. The rating outlook is negative. Between US$1.0 billion and $2.5 billion of new global bonds will be issued in exchange for outstanding UMS Brady Bonds, also rated double-`B'. Both discount bonds and par bonds due Dec. 31, 2019 will be eligible for exchange. The bonds will be priced, and the principal amount determined, on April 30, 1996. Unlike the Brady Bonds eligible for the exchange, which are secured as to principal by U.S Treasury zero-coupon bonds and partly secured as to interest by other high-grade securities, the
