What Does Stock Ownership Breadth Measure?
Using holdings data on a representative sample of all Shanghai Stock Exchange investors, we show that increases in ownership breadth (the fraction of market participants who own a stock) predict low returns: highest change quintile stocks underperform lowest quintile stocks by 23% per year. Small retail investors drive this result. Retail ownership breadth increases appear to be correlated with overpricing. Among institutional investors, however, the opposite holds: Stocks in the top decile of wealth-weighted institutional breadth change outperform the bottom decile by 8% per year, consistent with prior work that interprets breadth as a measure of short-sales constraints.
|Date of creation:||Dec 2010|
|Date of revision:|
|Publication status:||published as James J. Choi & Li Jin & Hongjun Yan, 2013. "What Does Stock Ownership Breadth Measure?," Review of Finance, European Finance Association, vol. 17(4), pages 1239-1278.|
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