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Fractional Trading 2022-05-16

Subject:Fractional Trading

Guest:Vivian Fang, Associate Professor, Carlson School of Management, University of Minnesota

Host:Zhang Ran, Assistant Professor, ACEM-SJTU

Time:Friday, May 20, 2022, 9:00-10:30

Venue:Tencent Meeting

(Please send email to by 12:00 May. 19th for meeting number and password.)


Fractional trading (FT)—the ability to trade less than a full share—allows low-budget retail investors to trade high-priced stocks. This paper quantifies FT’s impact on retail ownership and trading of high-priced stocks by exploiting its sequential introduction at four brokerage firms since November 2019. While small individually, fractional trades can work collectively to generate price pressures and reversals among high-priced stocks if coordinated during attention-grabbing events (such as being featured in Robinhood’s Top Mover list or stock split announcements). Post-FT, stock splits depend less on nominal share prices but generate more transitory, positive price pressures that facilitate insider selling.

Guest Bio:

Vivian Fang is an Associate Professor of Accounting at Carlson School of Management, University of Minnesota. Vivian's research lies at the intersection of corporate finance and financial accounting, with a focus on the real effects of trading in financial markets, managerial myopia, executive compensation, and fraud. She has published in the Journal of Accounting Research, Journal of Finance, Journal of Financial Economics, Review of Financial Studies, and Management Science. Her work has been mentioned by various media outlets, including the Bloomberg, CNBC, Economist, Financial Times, Forbes, Harvard Business Review, Harvard Law Forum, Washington Post, Wall Street Journal, and Yahoo. Her paper "Equity Vesting and Investment" won a WFA Best Paper Award in 2015 and the IRRC Institute Research Award in 2017.  Her paper "The Long-Term Consequences of Short-Term Incentives" was the co-winner of the 2017 IRRC Institute Research Award and the 2017 ICPM Research Award. She serves as an Associate Editor for the Journal of Financial and Quantitative Analysis (JFQA). Vivian has taught Intro to Financial Accounting, Financial Statement Analysis, Accounting for M&A, and now teaches Intermediate Accounting and Cryptocurrency, Blockchain, and Their Business Applications at Carlson. Prior to pursuing an academic career, she worked as a tax consultant for Deloitte Tax LLP in its Detroit office. She is a Certified Public Accountant (CPA, inactive) and a Certified General Accountant (CGA, Canada, inactive). She also passed all three levels of the Chartered Financial Analyst (CFA) exams. Vivian holds a Ph.D. in Business Administration and a Master's in Accounting from Tulane University. She did her undergraduate study at Tsinghua University in China, where she graduated first in her class.