In early trading on Friday, shares of Under Armour ( UA ) topped the list of the day's best performing components of the S&P 500 index, trading up 8.5%. Year to date, Under Armour has lost about 46.3% of its value.
And the worst performing S&P 500 component thus far on the day is CSX Corp ( CSX ), trading down 7.8%. CSX Corp is showing a gain of 47.0% looking at the year to date performance.
Another component making moves today is Oracle Corp ( ORCL ), trading down 5.6%.