John Authers, Columnist

It's Biden's Bounce But Newton's Stock Market

Momentum is very much alive in equities, even if Super Tuesday casts doubt on it as a political concept.

The momentum trade is only going one way.

Photographer: ROBYN BECK/AFP/Getty Images

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Sir Isaac Newton’s laws of motion have been around for more than three centuries now, and they have stood the test of time. They remain a powerful description of movement in the physical world. They also appear to offer a great description of movements in markets, and in the political world — but that appearance may be deceptive.