After hours: February 10 at 6:40:00 PM EST ...

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At close: 7 February at 16:00:00 GMT-5 ...

The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations ...

At close: February 7 at 4:00:00 p.m. EST ...

A street sign for Wall Street is seen outside the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S. December 28, 2016. REUTERS/Andrew Kelly/File Photo Wall Street's main indexes ...