@article{PaientkoAmakude, author = {Paientko, Tetiana and Amakude, Stanley}, title = {Interconnected Markets: Unveiling Volatility Spillovers in Commodities and Energy Markets through BEKK-GARCH Modelling}, series = {Analytics}, volume = {3}, journal = {Analytics}, number = {2}, editor = {Aguilar-Ruiz, Jesus S.}, publisher = {MDPI}, issn = {2813-2203}, doi = {10.3390/analytics3020011}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:523-18367}, pages = {194 -- 220}, abstract = {Food commodities and energy bills have experienced rapid undulating movements and hikes globally in recent times. This spurred this study to examine the possibility that the shocks that arise from fluctuations of one market spill over to the other and to determine how time-varying the spillovers were across a time. Data were daily frequency (prices of grains and energy products) from 1 July 2019 to 31 December 2022, as quoted in markets. The choice of the period was to capture the COVID pandemic and the Russian-Ukrainian war as events that could impact volatility. The returns were duly calculated using spreadsheets and subjected to ADF stationarity, co-integration, and the full BEKK-GARCH estimation. The results revealed a prolonged association between returns in the energy markets and food commodity market returns. Both markets were found to have volatility persistence individually, and time-varying bidirectional transmission of volatility across the markets was found. No lagged-effects spillover was found from one market to the other. The findings confirm that shocks that emanate from fluctuations in energy markets are impactful on the volatility of prices in food commodity markets and vice versa, but this impact occurs immediately after the shocks arise or on the same day such variation occurs.}, subject = {Fl{\"u}chtigkeit}, language = {en} } @article{ParkPaientko, author = {Park, Bomee and Paientko, Tetiana}, title = {Assessing the Impact of Capital Expenditure on Corporate Profitability in South Korea's Electronics Industry: A Regression Analysis Approach}, series = {Analytics}, volume = {4}, journal = {Analytics}, number = {4}, editor = {Leung, Carson K.}, publisher = {MDPI}, issn = {2813-2203}, doi = {10.3390/analytics4040036}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:523-22062}, abstract = {This study investigates the relationship between capital expenditure (CAPEX) and long-term corporate profitability in South Korea's electronics industry. Using panel data from 126 listed electronics firms covering 2005-2019, the research applies fixed-effects regression analysis to examine how CAPEX influences profitability, measured by EBITDA/total assets. The results confirm that CAPEX exerts a positive and statistically significant long-term effect on profitability, with stronger but not significantly different impacts for large firms compared to SMEs. The findings contribute to empirical evidence on capital investment efficiency and the implications of economies and diseconomies of scale in capital-intensive industries.}, language = {en} } @article{RufoloPaientkoDziergwa, author = {Rufolo, Alessia and Paientko, Tetiana and Dziergwa, Katrin}, title = {M\&As and Corporate Financial Performance: An Empirical Study of DAX 40 Firms}, series = {FinTech}, volume = {4}, journal = {FinTech}, number = {3}, editor = {Liu, David (Yulong) and Shahzad, Jawad Syed}, publisher = {MDPI}, issn = {2674-1032}, doi = {10.3390/fintech4030043}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:523-21404}, abstract = {This study examines the impact of mergers and acquisitions (M\&As) on the financial performance of firms listed in Germany's DAX 40 index. Although M\&As are a widely used strategic tool intended to create value through synergies and market expansion, existing research provides conflicting evidence about their effectiveness. Using an empirical approach, we analyze the financial data of acquiring companies before and post-M\&A transactions to evaluate changes in profitability, liquidity and solvency. Our findings suggest that financial performance does not universally improve following acquisitions. Instead, results vary significantly based on deal characteristics and internal management factors. These results suggest that, while M\&A can be a pathway to growth, success depends heavily on the quality of execution and organizational integration. This paper contributes to the ongoing debate about the effectiveness of M\&As and provides insights for corporate decision-makers, investors, and policy stakeholders.}, subject = {Mergers and Acquisitions}, language = {en} }