SpaceX faces one of its biggest tests since going public as Elon Musk prepares to answer investors' questions during the company's first quarterly earnings call. The closely watched call comes after SpaceX shares have lost about half their value since peaking in June, fueling concerns that investors may have become overly optimistic about the company's long-term growth. The stock also faces fresh pressure this week as a lockup period expires, allowing insiders to begin selling shares. SpaceX shares closed Monday at $114.46, well below their June high of $225 and beneath the company's $135 initial public offering price. Operationally, the company recently completed a successful Starship satellite deployment after an earlier launch attempt was scrubbed.