CHICAGO (Standard&Poor's) Oct. 25, 2012--Standard&Poor's Ratings Services today said that its ratings on Irving, Texas-based Nexstar Broadcasting Group Inc. and on certain subsidiaries are unaffected by the upsizing of the recently rated senior unsecured notes. Nexstar increased the size of the notes to $250 million from the proposed amount of $200 million. Pro forma leverage remains in the low-6x area as the company will now draw less on the revolver to fund the acquisition of stations from Newport Television. The rating on the notes is 'B-' with a recovery rating of '6', indicating our expectation for negligible (0% to 10%) recovery for lenders in the event of a payment default. (For the latest complete corporate credit