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Does tax convexity matter for risk? A dynamic study of tax asymmetry and equity beta

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  • Adrian Lei
  • Martin Yick
  • Keith Lam

Abstract

The purpose of this study is to explore the effect of tax convexity on firms’ market risk, where tax convexity measures the progressivity of firms’ tax function. We examine the relation between equity beta and tax convexity based on a standard contingent-claims model, in which firms face nonlinear tax schedules. We verify that in the presence of default and growth options, the effect of tax convexity on beta is significant and depends on several countervailing forces. Tax convexity has a direct, positive effect on beta, as well as two indirect countereffects through default and growth options. The overall effect is ambiguous and quantitatively significant. As asymmetric tax schedules are used in most countries, assuming a linear tax schedule in the valuation framework may misestimate beta and thus fail to assess risk accurately. Our theoretical model shows that tax convexity should be taken into consideration when estimating equity beta. Copyright Springer Science+Business Media, LLC 2013

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  • Adrian Lei & Martin Yick & Keith Lam, 2013. "Does tax convexity matter for risk? A dynamic study of tax asymmetry and equity beta," Review of Quantitative Finance and Accounting, Springer, vol. 41(1), pages 131-147, July.
    • Handle: RePEc:kap:rqfnac:v:41:y:2013:i:1:p:131-147
    DOI: 10.1007/s11156-012-0303-2
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    Cited by:

    1. Sudipto Sarkar, 2014. "Valuation of tax loss carryforwards," Review of Quantitative Finance and Accounting, Springer, vol. 43(4), pages 803-828, November.
    2. Sami Attaoui, 2016. "Capital Structure And Tax Convexity When The Maturity Of Debt Is Finite," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 19(01), pages 1-20, February.
    3. Shu Feng & Chun-Yu Ho, 2016. "The real option approach to adoption or discontinuation of a management accounting innovation: the case of activity-based costing," Review of Quantitative Finance and Accounting, Springer, vol. 47(3), pages 835-856, October.

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    More about this item

    Keywords

    Equity beta; Tax convexity; Growth option; Default option; Contingent-claim model; G30;
    All these keywords.

    JEL classification:

    • G30 - Financial Economics - - Corporate Finance and Governance - - - General

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