This study examines the effect of the COVID-19 pandemic on the relationship between idiosyncratic volatility and …), we estimate monthly idiosyncratic volatility and investigate the effect of the COVID-19 pandemic at the portfolio and … idiosyncratic volatility and subsequent stock returns switches from negative to positive during the pandemic period. Furthermore, we …

One of the most popular univariate asymmetric conditional volatility models is the exponential GARCH (or EGARCH …) specification. In addition to asymmetry, which captures the different effects on conditional volatility of positive and negative … subsequent shocks to volatility. However, the statistical properties of the (quasi-) maximum likelihood estimator of the EGARCH …

growing importance of emerging markets, the literature on the nature of volatility in global markets is typified by … volatility in developed G7 and emerging BRICS markets. Broad market index data and GARCH models over the period 2003 …:01–2020:08 were employed. The study found evidence of volatility persistence, asymmetry, mean reversion and weak evidence of a risk …

economic aspects of the world. This study investigated the Islamic stock market's reaction and changes in volatility before and … nine different markets around the globe. To examine changes in volatility and persistence of risk, the generalized … hand, the volatility of Islamic stock indices was substantially amplified after the global health crisis was declared by …