After pioneering the MBS market 40 years ago, Ginnie Mae has long since given up its musket and buckskins, but the relatively tiny agency is now trying to stay on top of the biggest surge in its business with less-than-cutting-edge gear. Ginnie’s MBS issuance soared to a record $445.8 billion in 2009, a 66 percent increase from the previous annual record set the year before...