U.S. cable-TV operator Atlantic Broadband has announced that it signed an agreement to be acquired by Montreal-based cable operator Cogeco. We are placing our 'B+' corporate credit rating on the company on CreditWatch Positive. After our review of the company's creditworthiness, it is possible that we could raise the corporate credit rating on Atlantic Broadband as high as 'BB+', three notches above the current corporate credit rating. On July 20, 2012, Standard&Poor's Ratings Services placed its 'B+' corporate credit rating on Quincy, Mass.-based cable-TV operator Atlantic Broadband Finance LLC on CreditWatch with positive implications following the company's announcement that it signed a definitive agreement to be acquired by Montreal-based Cogeco Cable Inc. (BB+/Stable/--) in a transaction valued at