Nvidia stock slumps, the Dow’s losing streak, and Social Security’s big changes: Markets news roundup

The Dow Jones Industrial Average dropped more than 250 points on Tuesday, marking its longest losing streak since the 1970s.

The index closed down 267 points, falling 0.6% to 43,449. It has shed value since Dec. 4, hitting a nine-day losing streak. That is its longest since 1978.

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