Ioanid Rosu received two Ph.D.'s, one in mathematics in 1999 and one in financial economics in 2004, both from MIT, where he was awarded several fellowships, and the Charlie Housman Award for Excellence in Teaching. Between 2004 and 2010 he served as Assistant Professor of Finance at the University of Chicago, Booth School of Business, where he taught the Investments course in the MBA program and in the Executive MBA program, as well as a Ph.D. course in Asset Pricing and Market Microstructure. Since 2010, he is Associate Professor of Finance at HEC Paris, and currently teaches the Financial Markets course in the MBA program, and the Securities Markets in the Master's Program. He was voted the MBA Best Teacher of the Fundamental Phase in 2011, 2012, 2013, 2014, and 2015.
His research focuses on the liquidity of financial markets and its effect on asset prices and investor decisions. Recently, he has written several papers on High Frequency Trading and its effect on market quality. He is also interested in mergers and acquisitions, option pricing, and earnings management. His work has appeared in the Journal of Finance, Review of Financial Studies, and elsewhere. He is an Associate Editor of the Journal of Financial Markets.