DP16378 Who Owns What? A Factor Model for Direct Stockholding

Author(s): Vimal Balasubramaniam, John Y Campbell, Tarun Ramadorai, Benjamin Ranish
Publication Date: July 2021
Keyword(s): coholdings, Diversification, factor models, portfolio construction, Retail investors, Stockholding
JEL(s): G11, G12, G14, G2, G5
Programme Areas: Financial Economics
Link to this Page: cepr.org/active/publications/discussion_papers/dp.php?dpno=16378

We build a cross-sectional factor model for investors' direct stockholdings, by analogy with standard time-series factor models for stock returns. We estimate the model using data from almost 10 million retail accounts in the Indian stock market. We find that stock characteristics such as firm age and share price have strong investor clienteles associated with them. Similarly, account attributes such as account age, account size, and extreme underdiversification (holding a single stock) are associated with particular characteristic preferences. Coheld stocks tend to have higher return covariance, suggestive of the importance of clientele effects in the stock market.