Planet Money NPR

In 2006, Warren Buffett bet a million dollars that the most brainless, boring investment around would do better than the researched, handpicked investments of some of the smartest hedge fund managers in the world. The second class of Summer School looks at how that bet played out, the origins of the index fund, and why it's so hard to beat the market. Returning to the underlying theme of risk and reward, we also discuss how diversification reduces risk.

America's housing shortage has been decades in the making. A lot of people blame Baby Boomers — but is it really their fault? We unpack three big reasons for the shortage. | Subscribe to our weekly newsletter here.

The first class of Planet Money Summer School starts off with a field trip. With the help of a cow, two economists, and three cute animals, we learn what a stock is and how stocks are priced, and we begin to see the psychological forces that make prices move up and down on the stock market. Keep an eye out throughout for our big theme for the course this summer: risk and reward.

Last year, one of the biggest banks accidentally paid off a client's loan to its lenders — a $900 million mistake. Some of the recipients wouldn't give the money back. And then a surprising court ruling affirmed their no give-back. | Subscribe to our weekly newsletter here.

Two groups of people who would never meet in real life collide in a world of wizards and dragons. They battle it out in a low-tech video game, and it shakes the lives of a lot of real people living in a collapsing economy. | Subscribe to our weekly newsletter here.

For much of the 1970s inflation was bad. Prices rose at over 10 percent a year. Nothing could stop it — until one powerful person did something very unpopular. Today's show: How we beat inflation. | Subscribe to our weekly newsletter here.