Bitcoin spot and derivatives markets: Searching for completeness. - Helyette Geman; Henry Price (Risk Decis. Anal., 2021)

A sentiment analysis approach to the prediction of market volatility. - Justina Deveikyte; Helyette Geman; Carlo Piccari; Alessandro Provetti (Frontiers Artif. Intell., 2022)

Hype-Adjusted Probability Measure for NLP Volatility Forecasting. - Zheng Cao; Helyette Geman (CoRR, 2024)

A hype-adjusted probability measure for NLP stock return forecasting. - Zheng Cao; Helyette Geman (Frontiers Artif. Intell., 2025)

The Hype Index: an NLP-driven Measure of Market News Attention. - Zheng Cao; Wanchaloem Wunkaew; Helyette Geman (CoRR, 2025)