Warren is a value investor. He researches the value of corporations and invests as he sees fit. He also knows the perceived value of his own advice when offered up to politicians. While bailing out American companies isn't a capitalistic endeavor, using your influence over a flock of stupid politicians who would do handstands if you asked them is applying your lobbying power and investing your money on the anticipated result. The value wasn't in these banking stocks, it was Buffet's perceived lobbying power.
Buffett's Betrayal [View article]