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Does Idiosyncratic Risk Matter for Individual Securities?
Author(s) -
Vozlyublennaia Nadia
Publication year - 2012
Publication title -
financial management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.647
H-Index - 68
eISSN - 1755-053X
pISSN - 0046-3892
DOI - 10.1111/j.1755-053x.2012.01193.x
Subject(s) - autoregressive conditional heteroskedasticity , systematic risk , econometrics , connection (principal bundle) , economics , autoregressive model , affect (linguistics) , risk model , financial economics , mathematics , psychology , volatility (finance) , geometry , communication
This paper investigates the relationship between idiosyncratic risk and returns for individual securities within a generalized autoregressive conditional heteroskedascticity (GARCH)‐in‐mean framework. We demonstrate that, on average, 15% of stocks exhibit a significant relationship between returns and risk, of which 9% are positive. These proportions vary over time and with model specifications. Some characteristics influence the probability of a positive and a negative relationship, while others appear to affect only one, but not the other. This evidence implies that the factors that explain a positive connection between idiosyncratic risk and returns are different from the factors that explain a negative connection.