Mark is an experienced quantitative researcher, trader, and developer, with more than a decade of experience at high frequency trading firms. He specializes in writing alpha models, developing innovative trading strategies, and understanding market microstructure. He believes the key to successful trading is an incessant dedication to coming up with creative ideas.
Mark started his career at Citadel Investment Group’s High Frequency Trading unit in 2006, which made $892M in 2007 and $1.15B in 2008. It was called “among the very top of high-frequency firms in the world, the top-of-the-top tier”1. He developed alpha models and ran several profitable European auction strategies. He later joined the Electronic Trading Group at Knight Capital, which operated the largest equity dark pool in the world in late 20082 and was the largest trader in US Equities with market share of around 17% in 2012. These two groups still dominate market making today.
He then went to work at several trading startups where he honed his craft in leadership roles. He was the third employee at Radix Trading Inc., a company founded by his previous manager and former head of Citadel’s HFT unit, and led their equity trading efforts. He later co-founded a proprietary trading group focused on active-only trades on E-Mini S&P 500 futures, the most liquid and arguably most competitive contract on the CME. While the results of these privately companies are confidential, he was either amongst the most profitable traders or researched high sharpe (>4-6) strategies.