NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed Instituto Costarricense de Electricidad y Subsidiarias' (Grupo ICE) foreign- and local-currency Issuer Default Ratings (FC/LC IDRs) at 'BB+' as well as its National Scale ratings at 'AAA(cri)'. The Rating Outlook remains Negative. A complete list of rating actions follows at the end of this release. Grupo ICE's ratings are supported by its linkage to the Sovereign rating of Costa Rica (FC and LC IDRs rated 'BB+'/Negative Outlook by Fitch) wh