Nonprime lender Citadel Loan Servicing increased its maximum loan size this week to $1.5 million from $1.0 million. Dan Perl, Citadel’s CEO, said the lender is on track to close $14 million in originations in May and $15 million in June. He added that Citadel is close to entering the non-agency mortgage-backed security market. Walter Investment Management revived Ditech Mortgage and the lender will offer jumbos, among other products ... [Includes four briefs]