NEW YORK--(BUSINESS WIRE)--Recent reforms to Mexico's mortgage regulations, aimed at making mortgage transfers from one bank to another less costly for borrowers, may hold back the upward movement of lending rates on mortgage loans when interest rates eventually rise, says Fitch Ratings. The reforms encourage lender competition and limit the benefit of higher net interest incomes that normally accompany rising interest rates. Mexico's reforms were enacted in January 2014 under the Law of Transp