Subject: Re: What are we missing?
"A smart young man is said to have approached Mr. Rockefeller with the question, “Mr. Rockefeller, what do you think Standard Oil stocks will do?” After ponderous deliberation, the reply was, “Young man, I think they will fluctuate.”" -- Washington Post, 1924

Apparently the story is apocryphal, but still a good reminder : )
Sometimes it just isn't worth trying to figure out why prices are doing what they're doing. In the case of this bull market for Berkshire, all but 10% of the ~55% price rise in the last 3 years is simply tracking the S&P.

Jim