Abstract
The U.S. equity markets are largely driven by actions of institutional investors. Using quarterly 13-F holdings, we construct the Herfindahl-Hirschman Index of institutional investor concentration as a measure of granularity. We study how granularity affects: the cross-section of returns, conditional variances and downside risk. Next, we study the impact of granularity in a demand-driven asset pricing model introduced by Koijen and Yogo (2019). We derive a decomposition of expected returns in terms of equally weighted asset demands and granularity residuals. Using this decomposition, we revisit the empirical stylized facts pertaining to granularity and asset pricing.
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