Charles Schwab is trading 4.7% up at $110.14 after rising from the September 18 regular-session close of $105.25; no verified late-breaking company-specific catalyst was identified.
- Recent coverage includes a September 14 Anthropic integration announcement and a September 17 investor-update scheduling notice, neither directly explaining the September 18 after-hours jump.
- The Nasdaq rose 0.80% and the S&P 500 rose 0.27%; broader markets were mixed.
- Attribution remains uncertain.