On May 28, AST SpaceMobile fell 5.47% in regular trading, trading at $122.51/share, with trading volume of approximately $732 million. The decline was driven by concentrated profit-taking pressure following a sharp multi-day rally.

The stock had surged over 30% in the preceding week, with a single-day gain as high as 19% on May 27, climbing rapidly from $94.52 on May 21 to above $125. Multiple catalysts fueled the rally: SpaceX officially filed its Nasdaq IPO application targeting up to $75 billion in fundraising with a potential listing in mid-to-late June; major U.S. telecom carriers announced plans to form a joint venture for satellite direct-to-device services, validating AST SpaceMobile's commercial prospects as the sole provider capable of delivering hundreds of Mbps space-based broadband to unmodified smartphones; and the company's CEO reaffirmed plans to launch 45 satellites this year while projecting EBITDA margins above 80%.

After accumulating substantial short-term gains, investors moved to lock in profits, releasing selling pressure during regular trading hours. The stock has also become a trending topic on Reddit's WallStreetBets community, reflecting elevated retail attention.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)