|
|
Sovereign credit risk drivers in a spatial perspective.
Záhlava, Josef ; Gapko, Petr (advisor) ; Janský, Petr (referee)
This thesis analyses what drives sovereign credit risk when contagion is con- trolled for. CDS spreads are used as a measure of credit risk and bond yields are used to estimate interconnectedness of the examined countries. The main contribution lies in the use of high-frequency data and a robust wavelet based estimator in addition to spatial econometric model. The aim of this thesis is to test for presence of contagion and to evaluate which fundamentals are decisive for market perception of sovereign credit risk. Another goal is to evaluate the possibility of a structural break caused by the Greek debt restructuring. The results show that the restructuring did bring change. Contagion is present during the post-crisis period and it diminishes as the economies recover. Sim- ilarly, fundamentals are of higher importance in the post-crisis period when compared with the following period. JEL Classification C22, C31, C33, G01, G32, G33 Keywords spatial econometrics, CDS spreads, sovereign credit risk, financial contagion, realised covari- ance Author's e-mail josef.zahlava@gmail.com Supervisor's e-mail petr.gapko@seznam.cz
|
|
|
A time-varying copula approach to equity market contagion
Horáčková, Petra ; Baruník, Jozef (advisor) ; Buzková, Petra (referee)
The dependence structures in financial markets count among the most frequently discussed topics in the recent literature. However, no general consensus on modeling of the cross-market linkages has been reached. This thesis analyses the dependence structure and contagion in the financial markets in Central and Eastern Europe. Tail dependence, symmetry and dynamics of the dependence structure are examined. A conditional copula framework extended by recently developed dynamic generalized autoregressive score (GAS) model is used to capture the conditional time-varying joint distribution of stock market returns. Considering the Czech, Croatian, Hungarian, Austrian and Polish stock market indices over the 2005-2012 period, we find that time-varying Student's t GAS copula provides the best fit. The results show, that the degree of dependence increases substantially during the global financial crisis, having a direct impact on portfolio optimization.
|
|
|
Conventional vs. Shariah stock indices: Volatility, Financial Contagion, Interest Rate Risk and Gold as Safe Haven
Hashmi, Osaid ; Kočenda, Evžen (advisor) ; Baxa, Jaromír (referee)
The thesis aims at the comparison of volatility between conventional stock indices and their Shariah counterparts. We study the time-varying volatility and correlation of both categories using GARCH models, during Global Financial Crisis and afterwards, from January 2008 to March 2017. We analyze the Global stock indices drilling down into their Developed and Emerging market segments, and study the U.S. market; considering U.S. as the origin of the crisis. Extending traditional approach, we study difference of time-varying volatility between conventional and Shariah indices, and thoroughly study its dynamic development during the study period. Employing DCC-GARCH, we investigate the financial contagion within markets and find Shariah indices to be significantly affected by it. We find Shariah stocks to be less risky and a diversification opportunity during crisis, but based on market; unlike other markets, Shariah stocks are more volatile in Emerging markets. We also examine correlations of stock indices with interest rates and analyze the role of gold as a safe-haven for Shariah investors. We observe Shariah indices to be having correlation with interest rates similar to that of conventional indices, hence exposed to interest rate risk. Finally, we find that gold is less correlated to Shariah...
|
|
|
Sovereign credit risk drivers in a spatial perspective.
Záhlava, Josef ; Gapko, Petr (advisor) ; Janský, Petr (referee)
This thesis analyses what drives sovereign credit risk when contagion is con- trolled for. CDS spreads are used as a measure of credit risk and bond yields are used to estimate interconnectedness of the examined countries. The main contribution lies in the use of high-frequency data and a robust wavelet based estimator in addition to spatial econometric model. The aim of this thesis is to test for presence of contagion and to evaluate which fundamentals are decisive for market perception of sovereign credit risk. Another goal is to evaluate the possibility of a structural break caused by the Greek debt restructuring. The results show that the restructuring did bring change. Contagion is present during the post-crisis period and it diminishes as the economies recover. Sim- ilarly, fundamentals are of higher importance in the post-crisis period when compared with the following period. JEL Classification C22, C31, C33, G01, G32, G33 Keywords spatial econometrics, CDS spreads, sovereign credit risk, financial contagion, realised covari- ance Author's e-mail josef.zahlava@gmail.com Supervisor's e-mail petr.gapko@seznam.cz
|
|
|
A time-varying copula approach to equity market contagion
Horáčková, Petra ; Baruník, Jozef (advisor) ; Buzková, Petra (referee)
The dependence structures in financial markets count among the most frequently discussed topics in the recent literature. However, no general consensus on modeling of the cross-market linkages has been reached. This thesis analyses the dependence structure and contagion in the financial markets in Central and Eastern Europe. Tail dependence, symmetry and dynamics of the dependence structure are examined. A conditional copula framework extended by recently developed dynamic generalized autoregressive score (GAS) model is used to capture the conditional time-varying joint distribution of stock market returns. Considering the Czech, Croatian, Hungarian, Austrian and Polish stock market indices over the 2005-2012 period, we find that time-varying Student's t GAS copula provides the best fit. The results show, that the degree of dependence increases substantially during the global financial crisis, having a direct impact on portfolio optimization.
|
|
|
Impact of sovereign debt crisis in Greece on its neighboring countries
Papoušek, Radan ; Geršl, Adam (advisor) ; Kuc, Matěj (referee)
In this thesis, I analyze contagious effects stemming from Greece to Bulgaria, Cyprus, Italy, and Turkey during the Greek sovereign debt crisis. Using the VAR framework, I estimate adjusted cross-market correlation coefficients, and then test them on con- tagion. My research is based on examination of 10-year sovereign bonds and stock market indices in time period spanning from December 2004 to August 2012. The thesis finds that contagious impacts arising from the Greek crisis were present in all the examined countries. I also find significant interdependence among some of the examined countries. The existence of transmission channels suggests that the crisis could spread easily from Greece.
|
guest ::
