Spillovers between positively and negatively affected service sectors from the COVID-19 health crisis: Implications for portfolio management

This study empirically investigates and contributes new evidence to the ongoing topic of potential volatility spillover, efficient portfolio management, and hedging strategies. We investigate the connectedness between the travel and leisure sector (which was negatively affected by the COVID-19 pandemic) and healthcare, technology, and telecommunications sectors (which were positively impacted by the pandemic). We selected these four service sectors because they have been impacted by the pandemic and are also crucial for the world's economy. We separately perform a connectedness analysis for four regions: Europe, Eastern Europe, Asia-Pacific, and North America. The main findings indicate a rise in return and volatility spillovers during the COVID-19 outbreak in the selected sectors. Healthcare, telecommunications, and technology sectors are major transmitters of volatility shocks to the travel and leisure sector during the crisis. The portfolio analysis shows that investors should include healthcare, telecommunications, and technology sectors in their equity portfolios to reduce investment risk and protect expected returns during the pandemic. Hedge ratios vary over crisis and non-crisis periods, highlighting the option of adjusting hedging strategies during turbulent and stable periods. The study also eval-uates efficient portfolio management strategies shaped during the COVID-19 pandemic using the estimated results of the DCC-GARCH approach.