Think Tank Makes a Case for GSEs to Become SIFIs. Alex Pollock, senior fellow at the R Street Institute, along with author Thomas Stanton, wrote Treasury Secretary Steve Mnuchin this week urging him to designate Fannie Mae and Freddie Mac as Systemically Important Financial Institutions (SIFIs).They said that it’s obvious the mortgage giants meet all the criteria specified by the Dodd-Frank Act and the Financial Stability Board for designation as SIFIs and they want the same protective capital and regulatory standards applied to the...