U.S. Steel Corp. shares fell in the extended session Tuesday after the steel producer missed Wall Street estimates for the quarter. U.S. Steel shares dropped 10% to $7. The company reported an fourth-quarter loss of $6.83 a share on revenue of $2.57 billion. Analysts surveyed by FactSet had forecast a loss of 88 cents a share on revenue of $2.53 billion. Of U.S. Steel's $999 million loss on the quarter, $606 million of that was the result of a tax provision, the company said.
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