CHICAGO--(BUSINESS WIRE)--Fitch Ratings will incorporate AT&T Inc.'s (AT&T) (NYSE: T) spending on spectrum under its review of the existing Negative Rating Watch. AT&T and its subsidiaries 'A' Issuer Default Rating and senior unsecured debt ratings were placed on Negative Rating Watch following the announcement on May 29, 2014 that AT&T had an agreement to acquire DIRECTV. The company's 'F1' short-term IDR and commercial paper ratings also remain on Negative Watch. On Jan. 30, 2