The top subprime securitizers structured an increased number of their deals into special classes that meet the balance requirements of Fannie Mae and Freddie Mac during the first half of 2003, a new Inside B&C Lending analysis reveals. The analysis looked at issuance of so-called “GSE classes” – or securitization tranches comprised of mortgages with balances under the $322,700 conforming loan limit – designated for sale to