Testing the CAPM: Evidences from Italian Equity Markets

Canegrati, Emanuele (2008): Testing the CAPM: Evidences from Italian Equity Markets.

Abstract

The aim of the following work is to exploit principal econometric tecniques to test the Capital Asset Pricing Model theory in Italian equity markets. CAPM is a financial model which describes expected returns of any assets (or asset portfolio) as a function of the expected return on the market portfolio. In this paper I will first explain the meaning of the market risk and I will measure it via the estimation of beta coeffcients, which are seen as a measure of assets sensitivity to market portfolio fluctuations. The theoretical framework is based on the Sharpe (1964) and Lintner (1965) version of the CAPM and on the Pettengill's hypothesis (1995) over the relationship between betas and returns. Secondly, I will test the presence of specific effects which usually occur in financial markets; in particular, I will check the presence of the well-known January effect and detect the existence of structural breaks over the considered period of time.

• Item Type: MPRA Paper
• Language: English
• Keywords: CAPM, Structural breaks, January effect
• Subjects: G - Financial Economics > G1 - General Financial Markets > G14 - Information and Market Efficiency ; Event Studies ; Insider Trading; G - Financial Economics > G1 - General Financial Markets > G11 - Portfolio Choice ; Investment Decisions

References

[1] Black, Fischer, Michael C. Jensen and Myron Scholes, 1972, The Capital Asset Pricing Model: Some Empirical Tests, in M. Jensen ed. Studies in the Theory of Capital Markets, Praeger.

[2] John Y. Campbell, Andrew W. Lo, A. Craig MacKinley, 1997, The Econometrics of Financial Markets, Princeton University Press

[3] Cesari Riccardo, 1999, Introduzione alla Finanza del risparmio gestito: con una guida a Datastream, CLUEB [4] Ming - Hsiang Chen, 2003, Risk and return: CAPM and CCAPM in The Quarterly Review of Economics and Finance 43, 369 - 393

[5] Ralf Elsas, Mahmoud El-Shaer, Erik Theissen, Beta and Return revised Evidence from the German stock Market, 2003, Journal of International Financial Markets, Institutions and Money 13, 1 - 18

[6] Jonathan Fletcher, 1997, An Examination of the Cross-Sectional Relationship of Beta and Return: UK Evidence Journal of Economics and Business 49, 211-221

[7] Anthony Yanxiang Gu, 2003, The declining January effect: evidences from the U.S. equity markets, The Quarterly Review of Economics and Finance 43, 395 - 404

[8] Jiro Hodoshima, Xavier Garza-Gòmez, Michio Kunimura, 2000, Cross-sectional Regression Analysis of Return and Beta in Japan in Journal of Economics and Business 52, 515 -533

[9] Lintner, John, 1965, The Valuation of Risk Assets and the Selection of Risky Investments in Stock Portfolios and Capital Budgets, Review of Economics and Statistics, (47), pp. 13-37

[10] Sharpe, William F., 1964, Capital Asset Prices: A Theory of Market Equilibrium Under Conditions of Risk, Journal of Finance, (19), pp. 425-442

[11] Marno Verbeek, 2004, A guide to Modern Econometrics, John Wiley and Sons