Interconexion Electrica S.A. E.S.P.


MOODY´S Credit Rating Concept (Autopistas La Prosperidad)

Jun 21, 2012

OTC Disclosure News Service

Medellin, Colombia –

ISA´s removal from undertaking Autopistas La Prosperidad project has no immediate rating implications.

Information from the Colombia Goverment indicating that ISA would not be carrying out the Autopistas La Prosperidad project (formerly known as Autopistas La Montaña project) does not have immediate implications for ISA´s Issuer rating of Baa3 (outlook stable). The information is overall credit positive.

The above news release has been provided by the above company via the OTC Disclosure and News Service. Issuers of news releases and not OTC Markets Group Inc. are solely responsible for the accuracy of such news releases.

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