How everyday US investors are vibe-coding algorithms to automate trading strategies by connecting their stock portfolios to AI agents built with Claude or Codex (Hannah Erin Lang/Wall Street Journal)

Everyday U.S. investors are linking their stock portfolios to AI agents built with Claude or Codex to automate trading strategies, a practice dubbed “vibe-coding.” OpenAI reports its “automated research intern” now operates at 3.1 agent-workdays per human workday, with top users spending over $7,000 daily on tokens, while the company acknowledges unresolved alignment challenges and is developing a framework for reporting misalignment incidents.