Marketplace With Kai Ryssdal

A stretch of the U.S. is under a heat advisory this week — but summer starts Thursday. When we talk about a “hot” economy, it’s usually a good thing, but in real life, extreme heat sends economic productivity downhill. We’ll get into why. Also in this episode: Retailers launch copycat sales to compete with Amazon Prime Day, Baltimore longshoremen are finally back to work and the bond market is booming.