NEW YORK--(BUSINESS WIRE)--Fitch Ratings assigns the following ratings to the floater certificates and residual certificates of the tender option bond trust series listed below: --Floater certificates, series 2015-ZM0081 'AA-/F1', Stable Outlook; --Residual certificates, series 2015-ZM0081 'AA-', Stable Outlook. KEY RATING DRIVERS The long-term 'AA-', Stable Outlook ratings assigned to the series 2015-ZM0081 floater certificates and series 2015-ZM0081 residual certificates are based on the rati