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Some New Variance Bounds for Asset Prices

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  • Engel, Charles

Abstract

When equity prices are determined as the discounted sum of current and expected future dividends, Shiller (1981) and LeRoy and Porter (1981) derived a relationship between the variance of the price of equities, p[subscript t] and the variance of the ex post realized discounted sum of current and future dividends: p[superscript * subscript t]: Var(p[superscript * subscript t]) >= Var(p[subscript t]). The literature has long since recognized that this variance bound is valid only when dividends follow a stationary process. Others, notably West (1988), derive variance bounds that apply when dividends are nonstationary. West shows that the variance in innovations in p[subscript t] must be less than the variance of innovations in a forecast of the discounted sum of current and future dividends constructed by the econometrician, p-hat[subscript t]. Here we derive a new variance bound when dividends are stationary or have a unit root, that sheds light on the discussion in the 1980s of the Shiller variance bound: Var(p[subscript t] - p[subscript t - 1]) >= Var(p[superscript * subscript t] - p[superscript * subscript t - 1])! We also derive a variance bound related to the West bound: Var(p-hat[subscript t] - p-hat[subscript t - 1]) >= Var(p[subscript t] - p[subscript t - 1]).

Suggested Citation

  • Engel, Charles, 2005. "Some New Variance Bounds for Asset Prices," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 37(5), pages 949-955, October.
  • Handle: RePEc:mcb:jmoncb:v:37:y:2005:i:5:p:949-55
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    References listed on IDEAS

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    Cited by:

    1. Drobyshevsky Sergey & Narkevich Sergey & E. Pikulina & D. Polevoy, 2009. "Analysis Of a Possible Bubble On the Russian Real Estate Market," Research Paper Series, Gaidar Institute for Economic Policy, issue 128.
    2. Engel, Charles, 2014. "Exchange Rates and Interest Parity," Handbook of International Economics, in: Gopinath, G. & Helpman, . & Rogoff, K. (ed.), Handbook of International Economics, edition 1, volume 4, chapter 0, pages 453-522, Elsevier.
    3. Djeutem, Edouard & Kasa, Kenneth, 2013. "Robustness and exchange rate volatility," Journal of International Economics, Elsevier, vol. 91(1), pages 27-39.
    4. Lansing, Kevin J. & LeRoy, Stephen F., 2014. "Risk aversion, investor information and stock market volatility," European Economic Review, Elsevier, vol. 70(C), pages 88-107.
    5. Lansing, Kevin J., 2016. "On variance bounds for asset price changes," Journal of Financial Markets, Elsevier, vol. 28(C), pages 132-148.

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    More about this item

    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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