Aggregate Idiosyncratic Volatility

Geert Bekaert, Robert Hodrick () and Xiaoyan Zhang ()

Journal of Financial and Quantitative Analysis, 2012, vol. 47, issue 6, 1155-1185

Abstract: We examine aggregate idiosyncratic volatility in 23 developed equity markets, measured using various methodologies. We find no evidence of upward trends after extending the sample to 2008. Instead, idiosyncratic volatility is well described by a stationary autoregressive process that occasionally switches into a higher-variance regime that has relatively short duration. We also document that idiosyncratic volatility is highly correlated across countries. Most of the time variation in idiosyncratic volatility can be attributed to variation in a growth opportunity proxy, total (U.S.) market volatility, and in most specifications, the variance premium, a business cycle sensitive risk indicator.

Date: 2012
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Working Paper: Aggregate Idiosyncratic Volatility (2010)
Working Paper: Aggregate Idiosyncratic Volatility (2010)
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Persistent link: https://EconPapers.repec.org/RePEc:cup:jfinqa:v:47:y:2012:i:06:p:1155-1185_00

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