Warren Buffett Dumped Shares of Amazon, Apple, and Bank of America, and Added One Brand-New Stock in His Final Quarter Before Retirement

The Oracle of Omaha's final quarter as Berkshire Hathaway CEO revealed more significant net selling activity, and one curious $352 million purchase.Data is the fuel that keeps Wall Street running -- and few announcements are more telling than the quarterly filing of Form 13F with the Securities and Exchange Commission. A 13F provides investors with a road map of the stocks that Wall Street's savviest money managers bought and sold in the latest quarter.The latest round of 13Fs features the last trading acti ...