CHICAGO (Standard&Poor's) June 17, 2015--Standard&Poor's Ratings Services said today that its 'BBB-' issue-level rating and '1' recovery rating on New York City-based satellite radio company Sirius XM Radio Inc.'s revolving credit facility remain unchanged following the company's upsizing of the revolver to $1.75 billion from $1.25 billion and extension of the debt's maturity to 2020 from 2017. The '1' recovery rating indicates our expectation for very high recovery (90%-100%) of principal in the event of a default. Our 'BB' corporate credit rating and stable outlook on Sirius XM are not affected. The corporate credit rating incorporates our expectation that the company's leverage will not increase above our 4x threshold for the rating because of its good