If any investor has stood the test of time, it's Warren Buffett, and with good reason. For years, the "Oracle of Omaha" has had a rock star-like presence in the investing world, and his annual Berkshire Hathaway shareholders meeting draws thousands of loyal fans who are investors. They were stunned at this year's meeting when Mr. Buffett announced that he is stepping down at the end of the year as CEO of the investment giant. While he will remain Chairman of the Board and continue to have a voice in the day-to-day operations, his pre-announced successor, Greg Abel, will assume the CEO position at the end of the year.