The securitization of loans exceeding the Fannie/Freddie purchase limit edged slightly higher in the first quarter of 2003, hitting $65.11 billion, according to data compiled by Inside MBS & ABS. That represented a 5.0 percent increase over the $61.5 billion of jumbo mortgages securitized during the fourth quarter of 2002. While most of the jumbo securitization, $52.23 billion, came in traditional prime jumbo