Larry Harris holds the Fred V. Keenan Chair in Finance at the University of Southern California Marshall School of Business. Professor Harris' research, teaching, and consulting address regulatory and practitioner issues in trading and in investment management. He has written on trading rules, transaction costs, and market regulations. He authored Trading and Exchanges: Market Microstructure for Practitioners, an introduction to the economics of trading, that was published in 2003.
SEC Chairman Harvey Pitt appointed Professor Harris to serve as Chief Economist of the U.S. Securities and Exchange Commission in July 2002 where he continued to serve under Chairman William Donaldson through June 2004. As chief economist, Harris was the primary advisor to the Commission on all economic issues. He contributed to the development of regulations implementing Sarbanes-Oxley, the resolution of the mutual fund timing crisis, the specification of the proposed Regulation NMS (National Market System), the promotion of bond price transparency, and numerous legal cases. Harris also directed the SEC Office of Economic Analysis in which 35 economists, analysts, and support staff engage in regulatory analysis, litigation support, and basic economic research.
Harris serves as research coordinator for the Institute for Quantitative Research in Finance (The Q-Group). He is a former associate editor of the Journal of Finance, the Review of Financial Studies, and the Journal of Financial and Quantitative Analysis. He also consulted for the New York Stock Exchange immediately following the 1987 stock market crash. Dr. Harris has also worked at UNX, Inc., an electronic pure agency institutional equity broker, and at Madison Tyler, LLC, a broker-dealer engaged in electronic proprietary trading in various markets. 
Professor Harris serves on the boards of Interactive Brokers, Inc. and the Clipper Fund, Inc., as well as the board the Los Angeles Society of Financial Analysts.
Ph.D. in Economics from the University of Chicago in 1982. Chartered Financial Analyst designation, conferred by the CFA Institute in 2010.
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Nasdaq Announces Mid-Month Open Short Interest Positions in Nasdaq Stocks as of Settlement Date May 15, 2020
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