S&P 500 Movers: IBM, TSO

In early trading on Monday, shares of Tesoro (TSO) topped the list of the day's best performing components of the S&P 500 index, trading up 7.4%.  Year to date, Tesoro registers a 10.8% gain.

And the worst performing S&P 500 component thus far on the day is International Business Machines ( IBM ), trading down 7.2%.  International Business Machines is lower by about 9.9% looking at the year to date performance.

Two other components making moves today are Mead Johnson Nutrition (MJN), trading down 4.5%, and QEP Resources (QEP), trading up 4.7% on the day.