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In early trading on Wednesday, shares of Western Union (WU) topped the list of the day's best performing components of the S&P 500 index, trading up 6.1%. Year to date, Western Union registers a 24.1% gain.
And the worst performing S&P 500 component thus far on the day is Alexion Pharmaceuticals (ALXN), trading down 9.3%. Alexion Pharmaceuticals is lower by about 17.3% looking at the year to date performance.
Two other components making moves today are Frontier Communications (FTR), trading down 7.3%, and Expeditors International of Washington (EXPD), trading up 4.7% on the day.
