The following video is from Monday's Investor Beat, in which host Chris Hill and analysts Matt Argersinger and Jason Moser dissect the hardest-hitting investing stories of the day.

In today's installment, shares of Apple (NASDAQ:AAPL) hit yet another 52-week low, and Warren Buffett releases the annual letter to Berkshire Hathaway(NYSE:BRK.A) (NYSE:BRK.B) shareholders, and, as always, there are several sagely takeaways. Those stories plus the top market movers and two stocks we'll be watching closely this week.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.