NEW YORK (Standard&Poor's CreditWire) July 13, 1999--Standard&Poor's today assigned its single-'A' long-term corporate credit rating to Edison International and its preliminary single-'A'-minus rating to the company's shelf registration of senior unsecured debt. Standard&Poor's also assigned its preliminary triple-'B'-plus rating to a shelf registration of cumulative quarterly income preferred securities (QUIPS) to be issued by EIX Trust I, EIX Trust II, and EIX Trust III (statutory business trusts). In addition, Standard&Poor's assigned its final rating of triple-'B'-plus to the up to $1 billion of QUIPS to be issued by EIX Trust I. At the same time, Standard&Poor's also affirmed Edison International's 'A-1' short-term corporate credit rating and its 'A-1' rating on