NEW YORK--(BUSINESS WIRE)--Fitch Ratings affirms all classes of John Deere Owner Trusts 2012-B and 2013-B at their current ratings. A full list of rating actions follows at the end of this press release. KEY RATING DRIVERS The affirmations of the class A notes reflect loss coverage levels consistent with the current ratings. As of the June 2015 reporting period, cumulative net losses totaled 9 basis points and 14 basis points for JDOT 2012-B and 2013-B, respectively. Both transactions are perfo