Sue S. Guan is the Albert J. Ruffo Associate Professor of Law at Santa Clara University School of Law. Her current research focuses on “finfluencers” and information in stock markets, financial misconduct, securities regulation, and market microstructure. Professor Guan’s recent scholarship will appear or has appeared in the University of Pennsylvania Law Review Online, the Harvard Business Law Review, and the Boston College Law Review.
Prior to joining Santa Clara University School of Law, Professor Guan was the Post-Doctoral Research Scholar in the Program in the Law and Economics of Capital Markets at Columbia Law School & Columbia Business School. Prior to entering academia, she was in private practice at Cleary Gottlieb Steen & Hamilton LLP, where she focused on complex commercial matters, including multiple benchmark-related antitrust class actions. She also represented pro bono a class of detainees at Rikers Island in a Section 1983 lawsuit. From 2012-2013, Professor Guan clerked for the Honorable Carlos F. Lucero on the Tenth Circuit Court of Appeals. Professor Guan holds a J.D. from the Yale Law School, where she was a Coker Fellow, and earned her B.A. from the University of Pennsylvania and B.S. in Economics from the Wharton School.
J.D., Yale University
B.A., University of Pennsylvania
B.S., Wharton School, University of Pennsylvania
Book Chapter
Meme Stock Trading, ELGAR CONCISE ENCYCLOPEDIA ON SECURITIES LAW AND REGULATION (Iris H. Chiu, Heikki Marjosola, & Tjio Hans ed., forthcoming 2027).
Department of Justice (US) on Compliance, ELGAR CONCISE ENCYCLOPEDIA OF COMPLIANCE LAW (James Fanto ed., forthcoming 2026).
Articles
Copy Trading and the Rise of the Shadow Intermediary, HARVARD BUSINESS LAW REVIEW (forthcoming 2026). | Link to SSRN
Securities Fraud and the Market for Individual Stocks, 2025 COLUMBIA BUSINESS LAW REVIEW 225 (2025). | Link to Columbia Business Law Review
Do Investors Pay Attention to Social Media? A Response to Christine Hurt, Socially Acceptable Securities Fraud, 49 JOURNAL OF CORPORATION LAW DIGITAL 101 (2024) (invited contribution). | Link to The Journal of Corporate Law
Fraud on the Social Media Market, 119 NORTHWESTERN UNIVERSITY LAW REVIEW ONLINE 206 (2024). | Link to Northwestern University Law Review
Manipulating Citadel: Strategies to Profit at the Expense of Retail Stock Traders’ Market Makers, 14 HARVARD BUSINESS LAW REVIEW 1 (2024) (with Merritt B. Fox & Lawrence R. Glosten). | Link to Harvard Business Law Review
Finfluencers and the Reasonable Retail Investor, 172 UNIVERSITY OF PENNSYLVANIA LAW REVIEW ONLINE 43 (2024). | Link to University of Pennsylvania Law Review
The Rise of the Finfluencer, 22 N.Y.U. Journal of Law and Business (2023) | Link to SSRN
Meme Investors and Retail Risk, 63 B.C. L. Rev. (2022) | Link to SSRN
Spoofing and its Regulation, with Merritt B. Fox, Lawrence R. Glosten, 2021 Colum. Bus. L. Rev. 1243 (2022) | Link to SSRN
Distributed Ledger Technology and the Securities Markets of the Future: A Stakeholder Survey, with Merritt B. Fox, Lawrence R. Glosten, Edward Greene , 2021 Colum. Bus. L. Rev. 651 (2021) | Link to SSRN
Benchmark Competition, 80 Md. L. Rev. 1 (2021) | Link to SSRN
Jus Cogens: To Revise a Narrative, 26 Minn. J. Int'l L. 461 (2017) | Link to Minnesota Law Scholarship Repository
Find Something, Say Something: Ethical Considerations of Outside Counsel Conducting Internal Investigations,
THOMSON REUTERS / WEST’S WHITE COLLAR CRIME REPORTER, Feb. 2015, at 3 (with Breon S. Peace & Elizabeth Vicens). | Link to Westlaw Journal