🟢 MBX Biosciences is trading 4.3% up in pre-market; reason remains unconfirmed

MBX Biosciences is trading at $63.53 (+4.25%) in pre-market on September 22, 2026; the reason remains unconfirmed.

• Recent coverage centers on the September 16 Morgan Stanley healthcare conference, updated September 21, rather than a new announcement.
• The September 21 session closed at $60.94, down 3.13%.
• Major index futures are broadly flat to modestly higher.