In early trading on Wednesday, shares of Union Pacific topped the list of the day's best performing components of the S&P 500 index, trading up 11.4%. Year to date, Union Pacific registers a 15.9% gain.
And the worst performing S&P 500 component thus far on the day is CoStar Group, trading down 10.4%. CoStar Group is showing a gain of 6.4% looking at the year to date performance.
Two other components making moves today are Robert Half, trading down 7.7%, and KeyCorp, trading up 7.0% on the day.
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