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Time Diversification: Empirical Tests

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  • Norman Strong
  • Nicholas Taylor

Abstract

This paper investigates the relationship between the performance of equity and the length of the investment horizon used by investors. We examine optimal portfolio time diversification and two definitions of ex ante time diversification. Using almost two centuries of US and UK data we find some support for the hypothesis that equity represents a significantly better investment over long investment horizons than over short investment horizons. Where this result holds, the likely explanation is mean‐aversion in fixed‐income asset returns. However, these results are sensitive to changes in investor risk preference, changes in utility function specification, changes in the sample period used, changes in investor constraints, and the definition of time diversification adopted. They also differ between the US and UK markets.

Suggested Citation

  • Norman Strong & Nicholas Taylor, 2001. "Time Diversification: Empirical Tests," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 28(3‐4), pages 263-302, April.
    • Handle: RePEc:bla:jbfnac:v:28:y:2001:i:3-4:p:263-302
    DOI: 10.1111/1468-5957.00374
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    Cited by:

    1. Ibarra, Raul, 2013. "A spatial dominance approach to evaluate the performance of stocks and bonds: Does the investment horizon matter?," The Quarterly Review of Economics and Finance, Elsevier, vol. 53(4), pages 429-439.
    2. Loh, Lixia, 2013. "Co-movement of Asia-Pacific with European and US stock market returns: A cross-time-frequency analysis," Research in International Business and Finance, Elsevier, vol. 29(C), pages 1-13.
    3. Summers, Barbara & Duxbury, Darren & Hudson, Robert & Keasey, Kevin, 2006. "As time goes by: An investigation of how asset allocation varies with investor age," Economics Letters, Elsevier, vol. 91(2), pages 210-214, May.
    4. Ken Johnston & John Hatem & Elton Scott, 2013. "A note on the evaluation of long-run investment decisions using the sharpe ratio," Journal of Economics and Finance, Springer;Academy of Economics and Finance, vol. 37(1), pages 150-157, January.
    5. Erkan Kalayci & Ulkem Basdas, 2010. "Does the prospect theory also hold for power traders? Empirical evidence from a Swiss energy company," Review of Financial Economics, John Wiley & Sons, vol. 19(1), pages 38-45, January.
    6. Kalayci, Erkan & Basdas, Ulkem, 2010. "Does the prospect theory also hold for power traders? Empirical evidence from a Swiss energy company," Review of Financial Economics, Elsevier, vol. 19(1), pages 38-45, January.
    7. Lakshman Alles & Louis Murray, 2009. "Investment performance and holding periods: An investigation of the major UK asset classes," Journal of Asset Management, Palgrave Macmillan, vol. 10(5), pages 280-292, December.

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