PARAGUAY - 2024/08/19: In this photo illustration, the UnitedHealth Group logo is displayed on a ... [+] smartphone screen. (Photo Illustration by Jaque Silva/SOPA Images/LightRocket via Getty Images)SOPA Images/LightRocket via Getty ImagesUnitedHealth stock (NYSE: UNH) has gained 80% in value since early January 2021 – jumping from levels of $335 then to around $600 now – vs. an increase of about 45% for the S&P 500 over this period. This can primarily be attributed to a significant 48% rise in the company ...