If any investor has stood the test of time, it is Warren Buffett, and sadly, that time has come to an end. For years, the "Oracle of Omaha†has had a rock star-like presence in the investing world, and his annual Berkshire Hathaway Inc. (NYSE: BRK-B) shareholders meeting draws thousands of loyal investors. They were stunned at this year's meeting when Buffett announced he would step down as CEO of the investment giant at year's end. While he will remain board chair and continue to have a voice in the day-to- ...