William Fallon

William Fallon is a trader at Old Mission Capital LLC, a leading quantitative trading and technology firm headquartered in New York, NY. At Old Mission, Fallon leverages advanced coding and data analysis skills to drive trading strategies and support the firm's market-making operations, focusing on multi-asset classes, including some of the most complex and illiquid exchange-traded funds (ETFs). His role involves applying quantitative methods and data science techniques to enhance trade execution and manage risk in highly dynamic markets.

Prior to joining Old Mission Capital in 2018, Fallon held trading roles at Flow Traders and Susquehanna International Group, both respected global trading firms recognized for their expertise in ETFs, options, and other derivatives. Throughout his career, he has specialized in quantitative and systematic trading, with a particular emphasis on ETF markets, market making, and high-frequency trading strategies.

Fallon holds a Bachelor of Arts in Mathematics and Economics from Brown University and completed advanced training at the NYC Data Science Academy, where he deepened his expertise in coding and data-driven analysis. His professional development reflects an ongoing commitment to integrating data science with financial markets, enabling him to contribute to innovative trading solutions and efficiency enhancements in multi-asset, ETF-focused environments.