NEW YORK (Standard&Poor's) June 17, 2013--Standard&Poor's Ratings Services has raised its rating on Indianapolis, Ind.'s gas utility system bonds (senior lien) to 'AA' from 'AA-', and on Indianapolis' Gas utility distribution system (GUDS) bonds (second lien) to 'AA-' from 'A+'. At the same time, Standard&Poor's assigned its 'AA-' rating to Indianapolis' GUDS bonds, series 2013A. The outlook is stable. "The upgrade reflects our view of sustained strong financial performance at the utility," said Standard&Poor's credit analyst Peter Murphy. The utility does business as Citizens Energy Group. We believe that due to the senior lien's stronger coverage and limited amount of debt outstanding, a one-notch rating distinction is warranted. In our view, gas