The Securities Industry and Financial Markets Association emphasized its concerns about the GSEs’ single security initiative in a letter sent last week to the Federal Housing Finance Agency. A large part of SIFMA’s letter focused on a lack of alignment between Fannie Mae and Freddie Mac. The trade group believes that the FHFA doesn’t have a strong enough role in maintaining the policy and practice alignment of the GSEs. “This causes significant concern about the potential outcome of the initiative,” the letter said, adding that the effective alignment of policies and practices, to achieve a continuing alignment to security performance, is the single most important factor in the success, or lack thereof, of the initiative.