Treasury Secretary Steve Mnuchin. Photo: Photo: Eitan Abramovich/AFP via Getty Images

Stocks sold off again on Monday with the Dow Jones Industrial Average closing down 653 points and the S&P 500 entering into a bear market with its 2.6% percent drop — the worst Christmas Eve for those indices ever.

Driving the declines: Steven Mnuchin’s call with the big bank CEOs didn’t inspire confidence. The market also didn’t buy assurances from a senior Treasury official to CNBC that the call was just a check-in and that the Treasury had no concerns about liquidity. Adding to concerns was a tweet from President Trump that said the economy’s “only problem” was the Fed.

  • As typical, trading volume was light in the shortened session ahead of Christmas, though, which can exaggerate stock moves.

Go deeper: 2019 could be the worst year for the economy since '08

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Updated 5 mins ago - Health

N.Y., N.J. and Conn. to require travelers from 35 states to quarantine

Photo: Spencer Platt/Getty Images

Travelers from 35 states are now required to quarantine for 14 days when traveling to New York, New Jersey and Connecticut, per New York state's health department.

What's new: New York City will set up bridge and tunnel checkpoints to enforce the quarantine order, Mayor Bill de Blasio said Wednesday, per the Wall Street Journal.

When U.S. politicians exploit foreign disinformation

Illustration: Aïda Amer/Axios

U.S. political actors will keep weaponizing the impact of widespread foreign disinformation campaigns on American elections, making these operations that much more effective and attractive to Russia, China, Iran or other countries backing them.

Why it matters: Hostile powers’ disinformation campaigns aim to destabilize the U.S., and each time a domestic politician embraces them, it demonstrates that they work.

58 mins ago - Technology

Samsung debuts Note 20, new foldable smartphone

The Galaxy Note 20 Ultra. Photo: Samsung

Samsung unveiled its crop of new mobile devices Wednesday, including two versions of the Note 20 smartphone, an updated foldable device, two tablets and a watch.

Why it matters: The new devices aim to give Samsung an early start in the second half of the year, with products aimed at parents buying fresh gear for the back-to-(home)school season.