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Does trading volume have a unit root?

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  • Salim Darbar
  • Partha Deb

Abstract

Time series properties of daily trading volume are examined for 22 New York Stock Exchange (NYSE) firms. Previous studies have found that trading volume of certain financial assets have a unit root. The Phillips-Perron approach, which is robust to heteroskedasticity and non-normality, isused to test the hypothesis of a unit root. There is strong evidence that daily volume is stationary around a linear trend. Also, for many stocks the deterministic trend is statistically significant. This result indicates the importance of appropriate detrending of trading volume before incorporating it in an economic model.

Suggested Citation

  • Salim Darbar & Partha Deb, 1995. "Does trading volume have a unit root?," Applied Economics Letters, Taylor & Francis Journals, vol. 2(5), pages 144-147.
    • Handle: RePEc:taf:apeclt:v:2:y:1995:i:5:p:144-147
    DOI: 10.1080/135048595357474
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    Cited by:

    1. Fleming, Jeff & Kirby, Chris, 2011. "Long memory in volatility and trading volume," Journal of Banking & Finance, Elsevier, vol. 35(7), pages 1714-1726, July.

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