Elon Musk a trillionaire no more as SpaceX stock tumbles (opens in new tab)

The world's richest man is a plain old billionaire again. When SpaceX went public on June 12 with the biggest IPO in history, Elon Musk immediately cemented himself as the first ever trillionaire. Now, less than two weeks later, Musk has already lost that trillionaire status — as SpaceX stock tumbles …