Why is Microsoft stock rallying 4% today?

Microsoft (MSFT) stock rallied about 4% on Friday after the software giant unveiled a major expansion of its Copilot AI assistant, adding coding capabilities, autonomous AI agents, and direct access to Office applications. The latest update is part of Microsoft’s effort to turn Copilot into a broader productivity platform for enterprise users, bringing together tools that previously required separate products. The company is also seeking to encourage more Office 365 customers to pay for its adva