Topics in applied financial economics
Authors: Τσιάρας Κωνσταντίνος 
Published: September 2021

This dissertation consists of four self-contained chapters in the form of papers. The first chapter investigates the volatility spillover effects and the contagion to sovereign CDS spread returns for Germany, France, China and Japan against USA. To the best of our knowledge, this is the first empirical research in the literature, which investigates potential spillovers and contagion effects among sovereign CDS markets. We use daily data from October 2011 to February 2018. Employing a fourvariate cDCC-AR-FIGARCH model, we find evidence of spillover effects for all the pairs of markets. Furthermore, we find empirical evidence of contagion for the pairs of markets: Germany – France, Germany – Japan and France – Japan. Regarding China’s CDS market we obtain little empirical support for contagion with the rest of the countries. The results are of interest to policymakers, who provide regulations for the CDS markets, as well as to market-makers. The second chapter investigates the spillover effects and the contagion to major equity and FOREX markets of G20. The financial markets under scrutiny are those of USA, Brazil, Italy, Germany and Canada. The frequency of the data is daily. We set the sample period from April 2010 to April 2018, namely after the GFC. Other related empirical work include Kanas (2000), who investigated the existence of spillovers between national equity and FOREX markets, by employing a trivariate AR-diagonal BEKK model for S&P 500, national equity markets and the respective FOREX markets. Our empirical results find evidence of spillovers and contagion effects for the pairs of markets: S&P500-BOVESPA, S&P500-FTSEMIB, S&P500-DAX30 and S&P500-S&PTSX. Moreover, the pairs of markets S&P 500-CAD/USD, S&P 5000BRL/USD and BOVESPA-BRL/USD present no contagion. The resultsare of interest to individual investors, who want to diversify their portfolios through international financial market investments. The third chapter investigates the spillovers and the financial contagion of four major FOREX markets. The FOREX markets are those of EUR/USD, JPY/USD, CHW/USD and GBP/USD. Lee (2010) investigates ten FOREX markets in Asia and Latin America to USD, among others and finds evidence of spillover effects from JPY/USD on Asian currency markets. A fourvariate dynamic Conditional Correlation Generalized ARCH (DCC-GARCH) model is employed for the period April 2011 to February 2018. The empirical results suggest contagion for all the pairs of markets. Additionally, we find that EUR/USD and GBP/USD present the strongest contagion effects, while CHW/USD show the lowest contagion levels with the rest of the markets.The fourth chapter analyses the spillover and the contagion effects of MSCI (global index), NIKKEI 400 (Japan), CSI 300 (China) and S&P 500 (USA). We consider a portofolio analysis in order to produce the standardized residuals using in a trivariate cDCC-GARCH framework. Other research work include Miyakoshi (2003), who suggests the existence of spillover effects between USA and Asian national equity markets. We extend the above analysis by taking into consideration the individual effects of MSCI on three of the most important national equity markets. We use daily data for the period 2008-2018. The main empirical results are the following: (1) portfolio analysis results suggest that MSCI has a significant positive influence on all equity market returns, (2) we find empirical evidence of spillovers on all pairs and (2) we find contagion for the pairs of markets: NIKKEI 400-CSI 300, NIKKEI 400-S&P 500 and S&P 500-CSI 300 that indicate risky positive correlations from an investor’s perspective.