Fannie Mae is discouraging some of its newly minted seller/servicers from issuing MBS through swap transactions and is instead pushing them toward its “cash window,” according to lenders and advisors familiar with the issue. “Fannie has increased its due diligence on lenders to ensure they are meeting, or are able to meet, the terms and conditions of an MBS issuance,” said Tim Rood, managing partner in The Collingwood Group, a Washington-based advisory firm. Rood, a former Fannie executive, told...