Arnold is a Quantitative Researcher at One River Asset Management. In this role, Arnold focuses on developing proprietary machine learning techniques for systematic alpha generation and portfolio construction. Prior to joining One River in 2023, Arnold ran his own quantitative trading firm for three years. Prior to that, Arnold has held quantitative research positions at a number of systematic hedge funds, including Tudor Investment Corporation and Cubist Systematic Strategies. Arnold received a DPhil (PhD) in machine learning from the University of Oxford, a Master's in Quantitative Finance from the Toulouse School of Economics, and a BSc in Economics from the London School of Economics. Arnold is fluent in seven languages, including German, French, Italian and Spanish.