NEW YORK (Standard&Poor's CreditWire) April 19, 1999--Standard&Poor's today placed the long-term ratings of Duke Energy Corp. and its affiliates, with the exception of Duke Energy Trading and Marketing LLC, on CreditWatch with negative implications (see list below). The 'A-1' short-term ratings for Duke Energy and Duke Capital were affirmed (see list). The rating for Duke Energy Trading and Marketing LLC remains on CreditWatch with positive implications pending the merger of Mobil Corp. and Exxon Corp. The CreditWatch listing reflects the increase in Duke's offer to acquire Empresa Nacional de Electricidad S.A.(Endesa Chile; A-/Stable/--) to about $2.8 billion, or 275 pesos a share, for 60% of Endesa Chile. In an effort to acquire a controlling interest in
