Cass R. Sunstein, Columnist

Does Deregulation Move Markets? Be Skeptical

To understand how a rollback of regulations might affect stock prices, listen to John Maynard Keynes.

December 7, 2017 at 10:00 AM UTC

Cass R. Sunstein is a former Bloomberg Opinion columnist. He is the author of “The Cost-Benefit Revolution” and a co-author of “Nudge: Improving Decisions About Health, Wealth and Happiness.”

High spirits.
Photographer: Michael Nagle/Bloomberg

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From the very start of his presidency, Donald Trump has made it a high priority to reduce the level of federal regulation. And in 2017, the stock market has boomed. Many business leaders believe that this is hardly a coincidence, and that Trump’s deregulatory efforts have fueled the boom. Are they right?

Probably not -- but it’s complicated.