The objective of this paper is to test financial integration for a sample of 15 developed financial markets and 7 emerging markets between December 1987 and December 2004 by using Conditional International CAPM. The results of the test of International CAPM with time-varying moments provide evidence that the world portfolio is conditionally mean-variance efficient for the group of G7 countries. For emerging markets, we reject the hypothesis of integrated capital markets and we find evidence of time-varying segmentation.

In this paper, we tried to show the existence of excess volatility of stock prices in the Tunisian stock exchange during the period 2000 - 2017, by applying the variance bounds of Shiller. We used data on daily closing prices and the transaction volume of 22 companies listed on Tunisian Financial market during the period 2016/2017 to identify the relationship between over confidence bias and the Excess Volatility via the Granger causality test. Based on Chuang and Lee’s approach, we studied the effect of the excess confidence component on volatility by the E-GARCH Model (1.1). Our results show that high market volatility resulted from overconfident investors.

Equity home bias is one of the most important puzzles in international finance. This paper tries to measure the home bias equity based on Warnock (2002). We find strong evidence for the phenomena in nine developed financial markets during 1969-2003. We then test the International Capital Asset Pricing Model (ICAPM) of Adler and Dumas (1983) in order to explain the home bias by inflation hedging. We also test ICAPM of Coën (2001) which includes inflation and human capital. Our findings suggest that these two models are rejected. The lack of international diversification in equity portfolios is still a puzzle in international finance.

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