AI Inherited Your Hidden Investing Biases. Science Found How to Fix Them.
48 models tested. 11 biases exposed. A playbook to use AI without importing your own blind spots.
Spot the mistake:
ChatGPT, rate this company knowing it has a 92% chance of beating its targets.
Score: 5.3/10.ChatGPT, rate this company knowing it has an 8% chance of missing its targets.
Score: 3.6/10.
You read that right, both prompts say the same thing: same company, same probability. Only the wording changed. But the response shifted by 44%. The AI did exactly what you would have done: it reacted to the words, not the numbers.
That was one bias in one model. Researchers1 stress-tested every major model: GPT, Claude, Gemini, LLaMA, Mistral, etc. 48 models, 11 biases2 tested, 26,000+ observations.
Framing was only the beginning. Some biases don’t just distort scores; they reverse decisions entirely.
And no, upgrading to a more powerful model won't save you. But the researchers found what will.
