In early trading on Thursday, shares of Illumina ( ILMN ) topped the list of the day's best performing components of the Nasdaq 100 index, trading up 4.3%. Year to date, Illumina registers a 51.8% gain.
And the worst performing Nasdaq 100 component thus far on the day is Ross Stores ( ROST ), trading down 1.5%. Ross Stores is lower by about 9.8% looking at the year to date performance.
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