CHAT is trading at $81.10, up 3.43%, as Anthropic’s IPO filing buoyed AI-linked stocks and improved sentiment around the technology sector. - The regular-session close was $78.41. - Technology stocks led S&P 500 sector gains, rising 1.6% on October 26. - Easing oil and upcoming Alphabet, Microsoft, and Amazon earnings supported risk appetite; no specific late-breaking after-hours catalyst was verified.