Abstract
We develop a market-wide illiquidity risk factor based on run lengths and find that it is priced using standard asset-pricing specifications. Our theoretical framework of equity returns derives the result that average run lengths of individual stocks proxy for illiquidity, and are related to common measures of liquidity such as trading volume and trade price-impact. This relationship holds irrespective of the sampling frequency in the computation of run lengths. Thus, liquidity can be quantified by examining a stock’s run length signature, providing a statistical mechanics link across illiquidity metrics. Tests using daily equity return data for all stocks over the period 1962–2005 find that run lengths are decreasing in turnover, and increasing with bid-ask spreads, and price-impact. Illiquidity is shown to be a risk factor/characteristic in explaining equity returns.
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Thanks to Viral Acharya, George Chacko, Tarun Chordia, Jennifer Huang, Michael Pagano, George Penacchi, Priya Raghubir, Atulya Sarin, Mark Seasholes, Marti Subrahmanyam and seminar participants at Villanova University, Calpers, QWAFAFEW San Francisco, FDIC, and the University of Chicago conference on liquidity for helpful discussions. We are especially grateful to Yakov Amihud and an unknown referee for numerous suggestions and ideas. The first author acknowledges financial support from the Dean Witter Foundation and a Breetwor Fellowship.
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Das, S.R., Hanouna, P. Run lengths and liquidity. Ann Oper Res 176, 127–152 (2010). https://doi.org/10.1007/s10479-008-0508-x
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DOI: https://doi.org/10.1007/s10479-008-0508-x