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Rui D. is a Quantitative Research Analyst at Graham Capital Management, L.P. since July 2023, specializing in systematic trading strategies, portfolio construction, and risk management. Previous experience includes positions as an Asset Management Research Intern at ask2.ai, and a Quantitative Research Intern at AlphaCrest Capital Management LLC, where Rui developed proprietary optimization methods and quantitative strategies. Rui has also served as a Graduate Research Assistant at Stony Brook University, focusing on portfolio optimization and statistical estimation. Educational qualifications include a PhD in Applied Mathematics and Statistics from Stony Brook University, and multiple advanced degrees from Columbia University in Financial Engineering and Computational Mathematics, alongside certifications in Data Science and Data and Computational Science.