Here at Marketplace, we're doing a yearlong project on the 10-year anniversary of the financial crisis called Divided Decade. At the center of it, of course, were dodgy housing loans that were packaged and resold as seemingly solid investments. They were known as mortgage-backed securities. Here's where the tech comes in: Back in the '90s, a guy named Michael Osinski and his wife, Isabel, wrote software that made it super simple to bundle loans into a security. Osinski retired from Wall Street eight years before the recession to farm oysters on Long Island, where he rode out the financial collapse with few ill effects on his life. Marketplace producer Eliza Mills met Osinski at his oyster beds to hear his story of making a tool that bankers used to bundle bad loans. She shares what she learned with Molly Wood. (09/17/18)