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.

Chris Hill has no position in any stocks mentioned. Jason Moser owns shares of Berkshire Hathaway. Fool contributor Matthew Argersinger owns shares of Berkshire Hathaway and Apple. Matt has the following options: long Jan. 2014 $80 calls on Berkshire Hathaway, long Jan. 2014 $500 calls on Apple, and short Jan. 2014 $550 calls on Apple. The Motley Fool recommends and owns shares of Apple and Berkshire Hathaway. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.