Investors shouldn't unthinkingly follow Buffett, or any other billionaire money manager, into Amazon or any other stock.

Famed investor and Berkshire Hathaway CEO Warren Buffett posted an unexpected letter to shareholders this week, providing an update on his will, along with some advice.

Tesla CEO Elon Musk is no stranger to eye-popping sums of money. After all, he currently holds the title of the world’s ...