The Efficient IPO Market Hypothesis: Theory and Evidence

Kevin R. James and Marcela Valenzuela

Journal of Financial and Quantitative Analysis, 2020, vol. 55, issue 7, 2304-2333

Abstract: We derive the optimal underwriting method and the quantitative initial public offering (IPO) pricing rule that this method implies in a market with informational frictions consisting of fully rational banks, issuers, and investors. In an efficient IPO market, an issuer’s expected initial return will be determined entirely by the combination of this pricing rule and issuer fundamentals. Applying this rule, we find that we can explain the quantitative magnitude of the principal aspects of the time-series and cross-sectional variation in IPO average initial returns. We conclude that the IPO market is efficient.

Date: 2020
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