Let's have a look at: The AES Corporation (NYSE:AES), PPL Corporation (NYSE:PPL), The Southern Company (NYSE:SO), Companhia Energetica Minas Gerais (ADR) (NYSE:CIG). As of the latest close, The AES Corporation (NYSE:AES) shares are down ...

Elsewhere in Brazil, utility shares slumped. State-run Centrais Eletricas Brasileiras SA (EBR, ELET6.BR) was the biggest decliner, falling 3.2% to $2.41.

Brazil-based integrated electric utility, Companhia Energetica de Minas Gerais ( CIG ), also known as CEMIG reported its financial results for the first quarter 2013 on May 17, 2013.