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.

While the heated debate about working remotely rages on, a new workplace disruptor is slowly emerging – the 4-day week. Thanks to several large trials in the US, UK and Canada, it’s a movement that’s ...