NEW YORK--(BUSINESS WIRE)--Fitch Ratings has taken the following actions on National Cooperative Bank, N.A.'s (NCB, the bank, or company) commercial servicer ratings: --Special servicer rating upgraded to 'CSS2-' from 'CSS3+'; --Primary servicer rating affirmed at 'CPS1-'; --Master servicer rating affirmed at 'CMS2-'. The upgrade to the special servicer rating reflects NCB's experienced asset managers, particular expertise in working out cooperative housing loans, as well as experience working