Ex post and ex ante returns and risks under different maturities of treasury bonds: evidence from developed and emerging markets

Medhat Hassanein and Islam Azzam

Macroeconomics and Finance in Emerging Market Economies, 2010, vol. 3, issue 1, 103-118

Abstract: Based on asset pricing theory, reward/risk ratios vary positively with maturity of Treasury securities. We study the effect of increasing Treasury bonds' maturity on ex post and ex ante returns and risks in developed and emerging countries. As maturity increases, we show that ex post and ex ante returns are negative and they decrease while ex post and ex ante risks increase in developed countries, resulting in a sharp increase in the ex post and ex ante coefficient of variation. This indicates that investors are negatively rewarded for the risk they face for investing in Treasury bonds in developed markets. In emerging markets, as maturity increases, ex post and ex ante returns are positive for medium and long maturities and they increase while ex ante risk decreases with maturity. As maturity increases, the coefficient of variation in emerging and developed markets increases, indicating that reward to investors for facing extra risk decreases as maturity increases; however, investors are much better rewarded in emerging than developed markets.

Keywords: Coefficient of variation; GARCH; yield to maturity (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1080/17520840903076523

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