On this episode of Stock Movers:

- SpaceX (SPCX) shares declined for the first time since its record initial public offering, snapping a three-day rally that had reached nearly 50%. Shares of Elon Musk’s rocket and AI firm fell about 5% after a volatile session that saw the stock initially gain as much as 6% before reversing. The decline dragged SpaceX back below Amazon.com Inc. in value, making it the sixth-largest company in the world with a market capitalization of about $2.5 trillion. Still, the shares are more than 42% above their $135 IPO price.

- CarMax (KMX) shares dropped after same-store sales and used-car profit declined for a fourth straight quarter, raising questions about the durability of its turnaround effort. Shares tumbled as much as 9.4% in New York trading. The stock had gained 35% this year through Tuesday’s close, though it’s still down by two-thirds since its 2021 high.

- Allbirds (BIRD), the maker of once-viral wool sneakers that suddenly announced a pivot to artificial intelligence earlier this year, has officially renamed itself Smartbird Inc. and is tapping the former leader of a Danish AI infrastructure group as its new chief. Nadia Carlsten is taking over as chief executive officer, replacing Joe Vernachio who has resigned from the company and the board of directors. Lily Yan Hughes, who has served as an independent director on the company’s board, was appointed board chair. The company’s shares initially soared on news of the pivot to AI, but the stock has since erased much of those gains.

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