The provided search results do not contain specific information about AI agents or agentic AI in trading during the week of October 20-28, 2025. The available search results focus on general AI stock trends, market outlooks using traditional AI forecasting tools, and broader trading market updates, but do not address autonomous AI agents or agentic AI systems in trading. To provide the requested news digest about AI agents or agentic AI, more specific search results targeting these topics would be needed.