THE FUSE

Elon Musk, the world's first and only trillionaire, has seen close to $100 billion in paper wealth evaporate in a matter of days as shares of SpaceX, the rocket company whose record-breaking initial public offering made him history's richest person, have fallen sharply from their post-listing highs on fears about a massive new debt issuance and concerns that the stock's opening week frenzy had disconnected its price from any credible fundamental anchor.