Shares of Apple are up a staggering 70% in 2019. That's not supposed to happen. By the time companies reach the size of Apple, their earnings growth (and their stock gains) tend to slow. But not in this market. We live in an age of huge companies getting huger. Barron's Avi Salzman and Alex Eule discuss the investment case for small-cap stocks and whether they might be having a comeback. Produced by Mette Lützhøft.

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