Buffett's Buying Banks, But Beware

So, before investors follow his lead into buying banks stocks, they might want to consider just what Buffett is buying through his investing company, Berkshire Hathaway Inc. BRK.A -0.74%   BRK.B -0.83%

Buffett has been on a bank-buying tear. Financial companies made up nearly 40% of the Berkshire portfolio at the end of March and it’s growing.

Now, let’s assume Buffett knows what he’s doing.