It's absolute gospel in the world of investing to study and understand the moves that Warren Buffett and Berkshire Hathaway are making - and then to follow them for profit.
And with good reason: Buffett's track record speaks for itself - and he augments his capital-markets genius with the homespun, down-to-earth personality that's cemented his spot as a hero to the masses.
One of Buffett's newest forays has taken his Berkshire investment vehicle into the energy sector.
But he wasn't the first to get there. We were. And it's paying off in a big way...