Florian Ewald

Florian Ewald completed his Bachelor's degree in Economics and Business Administration (B.Sc.) with a focus in Economics at Goethe University Frankfurt in 2020. In 2023, he obtained a Master's degree in Business Administration (M.Sc.) with a focus in Finance from Goethe University Frankfurt, specializing in electronic securities trading and quantitative analysis of financial markets. In his thesis, he examined the advancement of algorithms for optimal order execution using Deep Reinforcement Learning. Furthermore, he currently pursues a second Master's degree in Business Informatics, concentrating on Machine Learning. During his studies, he completed the "Honors Degree in Artificial Intelligence and Entrepreneurship", a program jointly offered by Goethe University Frankfurt, Philipps University Marburg, and TU Darmstadt.

Since May 2023, Florian Ewald is a research assistant at the chair of e-Finance.

Research Interests:

Machine Learning and Deep Learning in Finance
Algorithmic and High-Frequency Trading
Market Microstructure

Publications:

Scientific Journals

Clapham, Benjamin; Ewald, Florian; Jakobs, Jenny
Wokeness on the Line - AI Based Analysis of the Trump Effect on Corporate ESG Communication and Market Reaction
In: Finance Research Letters, Volume 107, September 2026, 110346
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Working Papers

Ewald, Florian; Clapham, Benjamin; Trimpe, Niklas
Threshold Transparency and the Magnet Effect of Circuit Breakers: Evidence From a Natural Experiment
In: Working Paper, presented at the 31th Forecasting Financial Markets Conference, Milan, Italy, 2026 Annual Meeting of the Southern Finance Association (SFA); Palm Springs, California, USA, and the 32nd Annual Meeting of the German Finance Association, Duesseldorf, Germany
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Clapham, Benjamin; Ewald, Florian; Gomber, Peter
Retail Order Flow Segmentation, Price Improvements, and Market Quality: Evidence From Xetra Retail
In: Working Paper, presented  at the European Financial Management Association 2026 Annual Meeting, Kristiansand, Norway, the Financial Management Association European Conference 2026, Braga, Portugal, the 42nd International Conference of the French Fiance Association, Clermont-Ferrand, France and the  31th Forecasting Financial Markets Conference, Milan, Italy, the 32nd Annual Meeting of the German Finance Association, Duesseldorf, Germany, 2026 Annual Meeting of the Southern Finance Association (SFA); Palm Springs, California, USA
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Clapham, Benjamin; Ewald, Florian; Gomber, Peter; Trimpe, Niklas
Don’t Stop Me Now! Identification and Prediction of Unnecessary Volatility Interruptions
In: Working paper, presented at the 65th Annual Meeting of the Southern Finance Association, Orlando, USA, the 2025 Annual Meeting of the Northern Finance Association, Calgary, Canada, the NYSE Microstructure Meets AI Conference 2024, New York, USA, and the 29th Forecasting Financial Markets Conference, Oxford, UK
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Miscellaneous

Clapham, Benjamin; Ewald, Florian; Gomber, Peter; Trimpe, Niklas
Identification and Prediction of Unnecessary Volatility Interruptions
In: efl insights 02/2025; Frankfurt am Main 2025
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