NY -- Standard&Poor's CreditWire 4/30/97 -- A portfolio review of Standard&Poor's Argentine debt ratings, prompted by its recent acquisition of Risk Annalysis, has resulted in affirmations of three-quarters of Risk Annalysis' domestic scale ratings. Of the remaining one-quarter of the ratings, minor criteria refinements resulted in three upward rating revisions, 10 downward revisions, two CreditWatch listings, and six ratings being placed under review. The vast majority of Argentine domestic scale rating adjustments involve rating changes of only one or two rating levels. (The specific ratings and brief rationales follow in separate releases.) The review was performed to ensure consistency between Standard&Poor's global rating scale and Risk Annalysis' domestic scale. The relatively large number of