# CHOI, Darwin

**Source**: https://bm.hkust.edu.hk/faculty/choi-darwin-1
**Parent**: https://bm.hkust.edu.hk/bizinsight/biztalks

CHOI, Darwin

Associate Head of FINA, Associate Professor

Department of Finance

[View Profile](https://fina.hkust.edu.hk/faculty/directory/dchoi)

### Recent Activities

[CHOI, Darwin](https://bm.hkust.edu.hk/faculty/choi-darwin-1)

[Using AI to Predict Stock Returns](https://bm.hkust.edu.hk/bizinsight/2025/04/using-ai-predict-stock-returns)

[Neural Networks](https://bm.hkust.edu.hk/bizinsight/tag/neural-networks)

[Regression Trees](https://bm.hkust.edu.hk/bizinsight/tag/regression-trees)

[International Asset Pricing](https://bm.hkust.edu.hk/bizinsight/tag/international-asset-pricing)

[Cross-section of Stock Returns](https://bm.hkust.edu.hk/bizinsight/tag/cross-section-stock-returns)

This paper delves into the application of machine learning to forecast international stock returns based on firm characteristics. We reveal that market-specific training significantly enhances the performance of neural networks (NNs), as NNs trained on individual markets outperform those using a global model based on U.S. data. Our analysis shows that NNs
...
[Read More](https://bm.hkust.edu.hk/bizinsight/2025/04/using-ai-predict-stock-returns)

[ [BizTalks](https://bm.hkust.edu.hk/bizinsight/biztalks "BizTalks") ]

[Watch Video](https://video.ust.hk/watch?video=5EBBA4D584A966C6&embed=Y)
[Read Full Paper](https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3489679)