Country-specific idiosyncratic risk and global equity index returns

C. James Hueng, Ruey Yau

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Studies have claimed that the "idiosyncratic volatility puzzle" in the firm-level data can be explained by certain time-series properties of the firm-specific shocks. The absence of this puzzle in the country-level index data implies that the time-series properties of the country-specific shocks are different from those of the firm-specific shocks. We find that the differences are, first, lagged idiosyncratic volatility is a better proxy for expected idiosyncratic risk in the country-level data. Second, idiosyncratic skewness is not a significant factor determining country-level index returns. Finally, country-specific index returns show momentum, as opposed to return reversals documented in the firm-level data.

Original languageEnglish
Pages (from-to)326-337
Number of pages12
JournalInternational Review of Economics and Finance
StatePublished - Jan 2013


  • Country-specific risk
  • Idiosyncratic volatility puzzle
  • International asset pricing


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