Idiosyncratic Risk in Greece: Properties and Portfolio Implications
AbstractThis paper analyses the properties of idiosyncratic risk in the Greek Stock Market by disaggregating the total volatility of stocks at market, industry, and firm level. Idiosyncratic risk is much larger and represents a smaller component of total volatility in Greece compared with other developed markets, is persistent, shows no trend over time but tends to increase more during upward than downward movements of the market. Average firm specific risk in Greece is best described by a two-state Markov process and during periods of high volatility (in 1987, in 1989-1990, in 1994 and in 1998-2000) the average idiosyncratic variance is twice than that of the low variance regime. The implications for portfolio and risk management of changing idiosyncratic volatility are also discussed.
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Bibliographic InfoPaper provided by University of Peloponnese, Department of Economics in its series Working Papers with number 0001.
Length: 31 pages
Date of creation: 2007
Date of revision:
Idiosyncratic Risk; Risk Management; Stock Market Volatility;
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