In the following video, Motley Fool contributor John Reeves takes a look at S&P's downgrade of Berkshire Hathaway's (NYSE:BRK-A) (NYSE:BRK-B) credit rating, from an AA+, to an AA. John highlights the concerns that S&P has with Berkshire at the moment, and also discusses some other factors that may have contributed to the downgrade. He then tells investors whether this is cause for alarm, or simply more background noise.

John Reeves owns shares of Berkshire Hathaway. The Motley Fool recommends Berkshire Hathaway and Moody's. The Motley Fool owns shares of 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.