In early trading on Thursday, shares of American Express topped the list of the day's best performing Dow Jones Industrial Average components, trading up 2.4%. Year to date, American Express registers a 2.0% gain.
And the worst performing Dow component thus far on the day is Merck, trading down 2.0%. Merck is lower by about 7.4% looking at the year to date performance.
Two other components making moves today are UnitedHealth Group, trading down 1.2%, and Visa, trading up 2.3% on the day.
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