I tested the Oura Ring 5 and own the previous model. Here's my take on whether upgrading is right for you. Nasha Addarich Martínez Head of Editorial Initiatives and Data Journalism Nasha is the Head ...

Editor's Note: APYs listed in this article are up-to-date as of the time of publication. They may fluctuate (up or down) as the Fed rate changes. CNBC Select will update as changes are made public.