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- W4306405737 abstract "Some events impact volatilities of most assets, asset classes, sectors and countries, causing serious damage to investment portfolios. The magnitude of such shocks is defined as global COVOL which is an abbreviation for global common volatility, a broad measure of all types of global financial risk. This paper introduces a statistical formulation of such events as common volatility innovations in both a multivariate volatility and an asset pricing context. Simulations verify the statistical performance of a simple but novel estimator and of a test to detect global COVOL. Two empirical examples show the events that have had the biggest impact on financial markets. The results are useful for portfolio optimization and risk forecasting." @default.
- W4306405737 created "2022-10-17" @default.
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- W4306405737 date "2023-01-01" @default.
- W4306405737 modified "2023-10-15" @default.
- W4306405737 title "What are the events that shake our world? Measuring and hedging global COVOL" @default.
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- W4306405737 doi "https://doi.org/10.1016/j.jfineco.2022.09.009" @default.
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