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Multifrequency-based Non-linear Approach to Analyzing Implied Volatility Transmission Across Global Financial Markets

100%

Boateng E. , Asafo-Adjei E. , Gatsi J. G. , Gherghina Ş. C. , Simionescu L. N.

nr nr 3

699-743

Research background: The contagious impact of the COVID-19 pandemic has heightened financial market's volatility, nonlinearity, asymmetric and nonstationary dynamics. Hence, the existing relationship among financial assets may have been altered. Moreover, the level of investor risk aversion and market opportunities could also alter in the pandemic. Predictably, investors in the heat of the moment are concerned about minimizing losses. In order to determine the level of hedge risks between implied volatilities in the COVID-19 pandemic through information flow, it is required to take into account the increased vagueness of economic projections as well as the increased uncertainty in asset values as a result of the pandemic.Purpose of the article: The study aims to examine the transmission of information between the VIX-implied volatility index for S&P 500 and fifteen other implied volatility indices in the COVID-19 pandemic.Methods: We relied on daily changes in the VIX and fifteen other implied volatility indices from commodities, currencies, and stocks. The study employed the improved complete ensemble empirical mode decomposition with adaptive noise which is in line with the heterogeneous expectations of market participants to denoise the data and extract intrinsic mode functions (IMFs). Subsequently, we clustered the IMFs based on common features into high, low, and medium frequencies. The analysis was carried out using Rényi transfer entropy (RTE), which allowed for the evaluation of both linear and non-linear, as well as varied distributions of the market dynamics.Findings & value added: Findings from the RTE revealed a bi-directional flow of negative information amid the VIX and each of the volatility indices, particularly in the long term. We found this behavior of the markets to be consistent at varying levels of investors' risk aversion. The findings help investors with their portfolio strategies in the time of the pandemic, which has resulted in fluctuating levels of risk aversion. Our findings characterize global financial markets to be "non-linear heterogeneous evolutionary systems". The results also lend support to the emerging delayed volatility of market competitiveness and external shocks hypothesis. (original abstract)

Zjawiska szokowe w rozwoju gospodarczym wybranych krajów Unii Europejskiej

100%

Janiga-Ćmiel A.

tom 206

34-45

Celem niniejszego artykułu jest zaprezentowanie analizy wzajemnych oddziaływań rozwoju gospodarczego wybranych państw Unii Europejskiej. Analiza wykonana zostanie na podstawie wielorównaniowego modelu rozwoju gospodarczego Polski oraz Niemiec. Przedstawioną analizę korelacji wykorzystano w celu zbadania istotności występowania efektu zarażania w dynamice równolegle realizowanych szeregów czasowych rozwoju gospodarczego.

The study examines the development of Polish economy as well as the economies of selected countries in the period from 2003 to 2013. Models based on the GDP growth in particular countries were built. A comparative analysis of the development of economies in the countries concerned (the United Kingdom, Belgium, France, Poland, the Netherlands, Germany) is presented. A multivariate GARCH model was built. The theory of the construction of a multivariate GARCH model and its estimation method are discussed. The occurrence of a contagion effect can be analysed by means of various methods, both mathematical and econometric. Analysis can also be carried out taking into account the multivariate GARCH models.

The Impact of Foreign Shocks on the Polish Economy

80%

Sznajderska A.

nr nr 1

33-52

This study concerns the impact of foreign shocks on the Polish economy. We consider output shocks from China, the euro area, and the United States. We estimate structural vector autoregressive (SVAR) models with the level of foreign economic activity as an endogenous variable and foreign output shock as an exogenous variable. We identify foreign output shocks outside the model. Our results indicate that a euro-area output shock has the strongest effect on the Polish economy. Meanwhile, the spillover effects from China are similar for Poland and the euro area.(original abstract)