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.