Standard Signal is an AI-powered hedge fund in which AI researches and executes every trade. The firm uses custom machine learning models trained via reinforcement learning to identify trading opportunities and make investment decisions without human intervention, and says its strategy trades live with a Sharpe ratio above 3. It was founded by Michael Royzen, who previously co-founded Phind (YC S22). Standard Signal is part of Y Combinator's Spring 2026 batch.