Business Administration

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Browsing Business Administration by Author "Akhtaruzzaman, M."

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    Financial contagion during COVID–19 crisis
    (Elsevier, 2020-05) Akhtaruzzaman, M.; Boubaker, S.; Şensoy, Ahmet
    This study examines how financial contagion occurs through financial and nonfinancial firms between China and G7 countries during the COVID–19 period. The empirical results show that listed firms across these countries, financial and non-financial firms alike, experience significant increase in conditional correlations between their stock returns. However, the magnitude of increase in these correlations is considerably higher for financial firms during the COVID-19 outbreak, indicating the importance of their role in financial contagion transmission. They also show that optimal hedge ratios increase significantly in most cases, implying higher hedging costs during the COVID-19 period.
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    The influence of Bitcoin on portfolio diversification and design
    (Elsevier, 2020) Akhtaruzzaman, M.; Şensoy, Ahmet; Corbet, S.
    We employ a VARMA DCC-GARCH model to search for portfolio diversification with Bitcoin in global industry portfolios and bond index. We find lower dynamic conditional correlations between Bitcoin and industry portfolios and bond index, allowing an investment in Bitcoin to hedge the risk against industry portfolios and bonds. The most effective hedge in a Bitcoin/industry (bond) portfolio is to short Utilities sector. Results are robust to the use of US industry portfolios and a cryptocurrency index instead of global industry portfolios and Bitcoin, respectively. Our results can help investors make informed decisions with regard to risk management and portfolio analysis.
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    Is gold a hedge or a safe-haven asset in the COVID–19 crisis?
    (Elsevier BV, 2021-09) Akhtaruzzaman, M.; Boubaker, S.; Lucey, B. M.; Şensoy, Ahmet
    This study examines the role of gold as a hedge or safe-haven asset in different phases of the COVID-19 pandemic crisis, corresponding to the timing of fiscal and monetary stimuli to support the weakened economy. Using high-frequency data, the results show that gold served as a safe-haven asset for stock markets during Phase I (December 31, 2019–March 16, 2020) of the pandemic. However, gold lost its safe-haven role during Phase II (March 17−April 24, 2020). The optimal weights of gold in S&P 500, Euro Stoxx 50, Nikkei 225, and WTI crude oil portfolios significantly increased during Phase II, suggesting that investors expanded investment in gold as a ‘flight-to-safety asset’ during the crisis. Further, hedging costs increased significantly during Phase II. These findings provide insight for individual and institutional investors and guidance to policymakers, regulators, and media on how gold evolved as a hedge and safe-haven asset in different phases of the pandemic.