Investors who bought the automaker’s shares in its initial public offering became rich. As a result, many have a deep faith in Elon Musk, the chief executive of Tesla and SpaceX.

© Brendan McDermid/Reuters

Antonio Gracias, an investor who has built a $65 billion stake in the company, exemplifies the economic upside of being Mr. Musk’s ally.

© Jim Vondruska for The New York Times

While Elon Musk may soon become a trillionaire, his rocket company’s market debut is set to the change the lives of its current and former employees, too.

© Chelsea Beck

Experts have been hopeful, but say the agency’s lunar aspirations are largely at the whims of two billionaires, Elon Musk and Jeff Bezos.

© Blue Origin

The SpaceX I.P.O. proves the stock market has become a hype machine.