Researchers tested GPT-4's ability to analyze financial statements and predict future earnings. Key findings:

1. GPT-4 outperformed human analysts in predicting earnings changes.
2. GPT-4 excelled in situations where human analysts struggled.
3. Its accuracy matched a specialized machine learning model.
4. GPT-4 generated useful narrative insights, rather than relying on training data.
5. Trading strategies based on GPT-4's predictions yielded better results.