Quantum BioPharma is trading at $2.38, up 5.31% versus the November 2 regular-session close of $2.26, with no verified company-specific catalyst identified for the after-hours rise.
- Quantum BioPharma fell 5.04% during the regular session; available coverage described biotech-sector weakness and identified no company-specific announcement for November 2.
- XBI was also lower on November 2, but reported declines differ across sources; sector weakness does not explain the after-hours rise.