[We show that Treasury security prices in the secondary market decrease significantly in the few days before Treasury auctions and recover shortly thereafter, even though the time and amount of each auction are announced in advance. These results are linked to dealers' limited risk-bearing capacity and end-investors' imperfect capital mobility, highlighting the important role of frictions even in very liquid financial markets. Our results imply a hidden issuance cost to the U.S. Department of the Treasury, estimated to be 9 to 18 bps of the auction size, or over half a billion dollars for the issuance size in 2007.]

Abstract 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.

We show that Treasury security prices in the secondary market decrease significantly in the few days before Treasury auctions and recover shortly thereafter, even though the time and amount of each auction are announced in advance. These results are linked to dealers' limited risk-bearing capacity and end-investors' imperfect capital mobility, highlighting the important role of frictions even in very liquid financial markets. Our results imply a hidden issuance cost to the U.S. Department of the Treasury, estimated to be 9 to 18 bps of the auction size, or over half a billion dollars for the issuance size in 2007.