American Electric Power is trading 15.66% up at $135.98 after a sharp after-hours move, with no clear company-specific catalyst identified.

  • It closed at $117.57 on September 24, 2026.
  • No company-specific announcement, earnings release, or filing explaining the surge was identified for September 24.
  • The latest confirmed catalyst was July’s guidance increase, already reflected in prior coverage; broader markets declined and do not clearly explain the move.