“Marketplace” host Kai Ryssdal needs a bit of help doing his classic “The Numbers” stock market segment so Ryan jumps in to save the day. The only problem is, he has no idea what any of it means. Ryan and Bridget head to Wall Street to learn about the stock market and answer Aditya’s question: how do stocks make money? Things get competitive as the duo try investing in stocks for themselves and see who can make more money.

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