Greg Abel Has Run Berkshire Hathaway for Most of a Year. Here's What He Has Actually Changed.

Berkshire Hathaway (NYSE: BRKA)(NYSE: BRKB) CEO Greg Abel took over from Warren Buffett at the beginning of this year. To say that he had big shoes to fill would be an understatement. Buffett is one of the most famous investors in history and has guided Berkshire to performance that has generated incredible wealth for long-term shareholders. With nearly three full quarters with Abel at the helm as CEO, there's been little change when it comes to the operations of Berkshire's fully owned subsidiaries. There haven't been any game-changing acquisitions to bring new businesses into the fold, either. Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia.