David and Chana's toxic asset, which has acquired the nickname Toxie, gets sick. And the payments that it's supposed to provide them every month stop.

Planet Money reporters David Kestenbaum and Jacob Goldstein went to Kenya to see the work of a charity called GiveDirectly in action. Instead of funding schools or wells or livestock, GiveDirectly has decided to just give money directly to the poor people who need it, and let them decide how to spend it.

David and Chana buy a toxic asset, from a guy named Wit Solberg, who used to work on Wall Street and now helps small banks who've been saddled with toxic assets. Turns out...it's hard to buy a toxic asset.

Alex Blumberg and NPR correspondent (and "Planet Money" reporter) Dave Kestenbaum examine what went wrong with the credit ratings agencies. When all these financial instruments that brought down our economy—the mortgage backed securities, the derivatives—were originally issued, the rating agencies (Standard and Poors, Moody's and Fitch) gave many of these things their top rating of triple-A.