U.S. television broadcaster Nexstar achieved positive core revenue growth in the fourth quarter of 2009 and is refinancing some of its debt to extend maturities. We are revising our outlook for the 'B-' rating on the company to positive from stable. We are also assigning issue-level and recovery ratings to the company's amended credit facilities and its proposed $325 million senior secured second-lien notes issue. The positive rating outlook reflects our expectation that core ad revenue will grow modestly in 2010, which, combined with political ad revenue, will enable the company to reduce its leverage significantly. On April 6, 2010, Standard&Poor's Ratings Services affirmed its ratings on Irving, Texas-based TV broadcaster Nexstar Broadcasting Group Inc., including the 'B-'