Earlier this year, Fannie Mae stopped guaranteeing mortgages in new or newly converted condo developments in which fewer than 70 percent of units have been sold or are under contract. Fannie's previous rules set the cutoff at 51 percent. Freddie Mac recently sent a bulletin to sellers and servicers announcing plans to adopt similar restrictions beginning July 1.The restrictions essentially raise mortgage rates for otherwise conforming mortgages (i.e. under $417,000 in Texas) where the condo development is effected by any of the following issues:- A new project in which 30% of units have not been sold . . .