S&P 500 Movers: MRNA, OXY

In early trading on Friday, shares of Occidental Petroleum topped the list of the day's best performing components of the S&P 500 index, trading up 5.1%.

Year to date, Occidental Petroleum registers a 45.7% gain.

In early trading on Friday, shares of Occidental Petroleum topped the list of the day's best performing components of the S&P 500 index, trading up 5.1%.

Year to date, Occidental Petroleum registers a 45.7% gain.

And the worst performing S&P 500 component thus far on the day is Moderna, trading down 3.8%.

Moderna is showing a gain of 268.5% looking at the year to date performance.

Two other components making moves today are HPQ, trading down 2.7%, and APA, trading up 3.8% on the day.