First, I suspect you are talking about BNI rather than BA.

Second, keep in mind that Buffett has been buying BNI stock for almost two years now. He knows the company well. He is also a long term value investor. He thinks the asset is fairly priced and will likely increase in value given the good position of the company in the industry and our strong desire for manufactured goods made in the far east, and likely rising costs of energy and other less efficient forms of transportation.

Buffett is not always right, but I think his reputation is well deserved. He does his research and places his bets. He wins more often than most people.