Why have markets soared since Donald Trump’s election?

NEW YORK, NY - JANUARY 25:  Traders work on the floor of the New York Stock Exchange (NYSE) in late morning trading after the Dow Jones industrial average crossed the 20,000 mark for the first time on January 25, 2017 in New York City. Solid earnings from major companies, including Boeing, led the morning rally.  (Photo by Spencer Platt/Getty Images)
Traders worked on the floor of the New York Stock Exchange in late morning trading after the Dow Jones industrial average crossed the 20,000 mark for the first time. –Spencer Platt / Getty Images

The Dow Jones industrial average crossed the 20,000 mark Wednesday. Yawn. These round-number milestones are totally arbitrary.

Look past those zeroes, though, and there is an interesting question: Why have markets soared since Donald Trump’s election?

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