Elon Musk-led SpaceX's shares debuted on Nasdaq on Friday after the world's largest IPO raised $75 billion at $135/share. The shares opened 11% higher and touched a high of $168.75/share, adding $353 billion to SpaceX's market value in minutes. As Musk became the world's first trillionaire post the listing, he said, "I'd given the company a 10% chance of success."