Why Is SpaceX Stock Down 3.15% Today, Sep 15? Share Unlock Pressure and Starship Execution Risk Weigh on SPCX

SpaceX (SPCX) slid 3.15% as higher Treasury yields weighed on growth multiples, while a large Sep 24 insider-share unlock adds near-term supply overhang. A scrubbed Falcon 9 national-security launch and heightened focus on the Sep 22 Starship orbital-test timeline increase execution risk around key operational catalysts tied to future Starlink capacity. Near-term positioning is likely driven by rates sensitivity, unlock dynamics, and mission outcomes.