http://seattletimes.nwsource.com/html/b ... mbo26.html
"By Elizabeth Rhodes
Seattle Times former real estate cheerleader
The evening before their home purchase was to close, Gary Becker and his wife, Amy Dacus, learned their mortgage to buy a Woodinville home had evaporated.
Unlike subprime borrowers defaulting on loans, the couple had a stellar credit score, a 20 percent down payment, strong employment history and had effortlessly purchased three prior homes.
But their new home's $670,000 sales price was large enough to require a "jumbo" loan, so named because it was for more than $417,000, the limit the nation's largest mortgage backers will fund.
Their California mortgage broker had unexpectedly lost its ability to provide jumbos — an event being repeated by lenders nationwide as the underlying funding for these large loans grows scarcer."
"Borrowers with good credit scores, good jobs and a down payment still have ready access to 30-year "conforming" loans — those funded through banks and mortgage brokerages by Fannie Mae and Freddie Mac, the giant federally chartered companies that fund the bulk of the nation's mortgages.
But Fannie and Freddie cap their loans at $417,000, which means that banks and mortgage companies must tap other sources, such as mortgage-backed securities, for jumbo funds."