NEW YORK (Standard&Poor's) April 11, 2008--Standard&Poor's Ratings Services said today it placed its ratings on Nexstar Broadcasting Group Inc. (Nexstar), including the 'B' corporate credit rating, on CreditWatch with negative implications. The Irving, Texas-based TV broadcasting company had total debt of about $681 million as of Dec. 31, 2007. "The CreditWatch placement reflects our heightened concern about Nexstar's ability to remain in compliance with its financial covenants," said Standard&Poor's credit analyst Deborah Kinzer.