CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed Trustmark Corp.'s (TRMK) ratings at 'BBB+/F2'. The Rating Outlook remains Stable. A full list of rating actions is at the end of this rating action commentary. KEY RATING DRIVERS IDRS and VR TRMK's ratings are affirmed at 'BBB+' and continue to be supported by its good asset quality and the leading market share in TRMK's home state of Mississippi and growing market share in other parts of the southeastern U.S. Meanwhile, Fitch continues to po