Warren Buffett Has Put Almost $78 Billion to Work in His Favorite Stock Over 7 Years, and It Recently Fell 10% -- Is the Oracle

  • Wall Street is full of successful money managers -- but few if any can command the attention of professional and everyday investors quite like Berkshire Hathaway (BRK.A -0.20%) (BRK.B -0.24%) CEO Warren Buffett.