The idiosyncratic risk during the Covid-19 pandemic in Indonesia
Open Access
- 13 October 2021
- journal article
- Published by LLC CPC Business Perspectives in Investment Management and Financial Innovations
- Vol. 18 (4), 57-66
- https://doi.org/10.21511/imfi.18(4).2021.06
Abstract
Conservatism in the CAPM and L-CAPM standards often emphasizes systematic risk to explain the phenomenon of the risk-return relationship and ignores idiosyncratic risk with the assumption that the risk can be diversified. The effect of the Covid-19 outbreak raises the question of whether the idiosyncratic risk can still be ignored considering that the risk has a close relationship to firm-specific risk. This study sets a portfolio consisting of 177 active public firms in the Indonesia Stock Exchange before and after the Covid-19 pandemic. On portfolio set, idiosyncratic risk is estimated by the standard CAPM and L-CAPM in the observation range from January 2, 2019, to June 30, 2021. The results of the analysis show that L-CAPM and CAPM produce significantly different idiosyncratic risks. Empirical evidence shows that the highest firm-specific risk is in the third period and has a stable condition since the fourth period. This condition is confirmed by regression results that idiosyncratic risk together with systematic risk positively affects stock returns in the fourth period as suggested by the efficient market hypothesis. Uniquely, both systematic risk and idiosyncratic risk based on L-CAPM do not show a significant effect on stock returns in the fifth period, so it is a strong indication that liquidity is an important factor that must be considered in making investments.Keywords
This publication has 51 references indexed in Scilit:
- Testing the relation between beta and returns in the Athens stock exchangeManagerial Finance, 2010
- Efficient market hypothesis in European stock marketsThe European Journal of Finance, 2009
- Idiosyncratic risk does not matter: A re-examination of the relationship between average returns and average volatilitiesJournal of Banking & Finance, 2005
- Does Idiosyncratic Risk Really Matter?The Journal of Finance, 2005
- Market liquidity as a sentiment indicatorJournal of Financial Markets, 2004
- The capital asset pricing model and the liquidity effect: A theoretical approachJournal of Financial Markets, 2000
- Risk and Return RevisitedThe Journal of Portfolio Management, 1997
- Common risk factors in the returns on stocks and bondsJournal of Financial Economics, 1993
- Expected stock returns and volatilityJournal of Financial Economics, 1987
- Systematic risk, total risk and size as determinants of stock market returnsJournal of Banking & Finance, 1986