Stock Market Today, Sept. 25: Microsoft Stock Jumps 4% After Revamping Copilot With Code Generation and Agentic AI Tools

Microsoft stock climbed 3.66% to $516.17 on September 25 after the company unveiled enhanced Copilot capabilities featuring code generation and agentic AI tools. The announcement signals Microsoft's push to monetize its AI investments as the company plans capex exceeding $115 billion in 2026, focused on data centers and AI infrastructure.

The new Copilot features represent a material expansion of Microsoft's AI product suite, moving beyond basic chat functionality into autonomous task execution and developer tools. The market's positive reaction reflects investor optimism that these capabilities will drive enterprise adoption and justify the unprecedented infrastructure spending.

The $115 billion capex commitment for 2026 marks one of the largest corporate infrastructure buildouts in history, underscoring management's conviction in AI monetization potential. However, the massive capital allocation heightens pressure on Microsoft to demonstrate tangible returns through subscription growth and margin expansion in its Azure and Office 365 platforms.