France's Financial Markets Authority (AMF) has awarded its 2025 Young Researcher in Economics prize to Alexandre Madelaine, an assistant professor at Erasmus University Rotterdam’s Rotterdam School of Management, under a programme launched in 2015 to support academic research linked to regulation and markets. The AMF highlighted Madelaine’s work using quantitative and qualitative approaches on how institutional and retail investors disseminate financial information and how that shapes other investors’ behaviour. His research includes analysis of why professional investors disclose information, the effects of publishing short-selling information including findings that such disclosures can encourage targeted companies to distribute dividends, and the consequences of retail investors’ use of financial forums, including dynamics of collective mobilisation observed in cases such as GameStop. The EUR 5,000 prize is intended for researchers in financial economics under 35 whose work is of specific interest to the market regulator, and was presented at the AMF Scientific Council meeting on 30 January 2026.