Stock Market Today, Sept. 25: Microsoft Stock Jumps 4% After Revamping Copilot With Code Generation and Agentic AI Tools
On Sept. 25, 2026, the productivity giant unveiled new AI capabilities designed to widen adoption and support premium monetization across its suite.
Microsoft's stock price surged 4% on September 25 following the unveiling of a revamped Copilot with advanced code generation and agentic AI tools. The enterprise software and cloud infrastructure provider's shares closed at $516.17, marking a notable increase. Investors are closely monitoring the adoption rates of AI and demand for cloud services in the upcoming quarters.
Trading volume for Microsoft's stock reached 37.9 million shares, a 15% rise above its three-month average of 32.9 million shares. In contrast, the S&P 500 index closed at 7,742, up 0.49%, while the Nasdaq Composite index finished at 27,069, up 0.48%. Among its competitors in the software, cloud computing, and enterprise productivity technology sectors, Oracle closed at $137.10, down 1.75%, and Alphabet's stock closed at $343.92, up 0.46%.
Microsoft's announcement of the new Copilot capabilities, including coding tools and a persistent AI agent, aimed to expand its AI offerings beyond its original chat assistant AI.
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