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We identify a novel concept of discretionary idiosyncratic volatility proxied by the idiosyncratic volatility component not related to the non-systematic industry volatility as a source of agency problems that have implications for firms’ cash holdings and their investment decisions. We find that firms with low discretionary idiosyncratic volatility, which likely captures discretionary effort and risk-taking by managers, have smaller cash reserves. Moreover, while high discretionary idiosyncratic volatility firms spend cash internally (internal capital building), low discretionary idiosyncratic volatility firms use it for external acquisitions, consistent with the “quiet life” hypothesis. Our findings thus indicate a need for reinforcement of existing regulations and corporate laws to control for agency costs, which could in turn reduce firm risk and the probability of financial meltdown at the aggregate level.

This study aims to explore the moderating role of corporate governance index between environmental disclosure and idiosyncratic risk.

Governance index constructed on the basis of principle component analysis (PCA) that comprised Board Duality (BD), Board Size (BS), Board Independent (BI) and Board Meeting (BM). Collected panel data of 103 nonfinancial companies listed in stock exchanges of Pakistan and India for the period 2013–2020. To address the issue of endogeneity, this study used generalized methods of moments (GMM).

This study revealed that corporate governance index negatively modifies the relationship between environmental disclosure and idiosyncratic risk for both Pakistan and India scenario. Findings of the study also disclosed environmental disclosure has positive significant impact on idiosyncratic risk in case of Pakistan, whereas it has a negative significant impact in case of India.

The major limitation of the study is availability of environmental disclosure data, future researchers may extend time period and add other emerging economies for analysis. Moreover, assumption of objectivity in the evaluation of environmental disclosure is another limitation of the study. Future research should examine the standard of environmental actions that businesses declare. This study used CAPM model to measure idiosyncratic risk, and future studies suggest measure idiosyncratic risk by using Fama & French four and five factors model for better results and robustness.

Study provides guidelines to investors for choosing stock for investment and also helpful for management to minimize agency problems through better governance mechanisms. Furthermore, study has deep implications for CEOs, portfolio managers, researchers and academics.

The study intended to empirically examine the moderation of Corporate Governance Index between the relationship of Environmental Disclosure and Idiosyncratic Risk.

This paper aims to investigate how organization capital influences different forms of corporate risk. It also explores how the relationship between organization capital and risks varies in the cross-section of firms.

To test the hypothesis, this study employs the ordinary least squares (OLS) regression model using a large sample of the United States (US) data over the 1981–2019 period. It also uses an instrumental variable approach and an errors-in-variables panel regression approach to mitigate endogeneity problems.

The empirical results show that organization capital is positively related to both idiosyncratic risk and total risk but negatively related to systematic risk. The cross-sectional analysis shows that the positive relationship between organization capital and idiosyncratic risk is significantly more pronounced for the subsample of firms with high information asymmetry and human capital. Moreover, the negative relationship between organization capital and systematic risk is significantly more pronounced for firms with greater efficiency and firms facing higher industry- and economy-wide risks.

The findings have important implications for investors and policymakers. For example, since organization capital increases idiosyncratic risk and total risk but reduces systematic risk, investors should take organization capital into account in portfolio formation and risk management. Moreover, the findings lend support to the argument on the recognition of intangible assets in financial statements. In particular, the study suggests that standard-setting bodies should consider corporate reporting frameworks to incorporate the disclosure of intangible assets into financial statements, particularly given the recent surge of corporate intangible assets and their critical impact on corporate risks.

To the best of the authors' knowledge, this is the first study to adopt a large sample to provide systematic evidence on the relationship between organization capital and a wide range of risks at the firm level. The authors show that the effect of organization capital on firm risks differs remarkably depending on the kind of firm risk a particular risk measure captures. This study thus makes an original contribution to resolving competing views on the effect of organization capital on firm risks.

This study aims to examine the link between corporate social responsibility (CSR) and idiosyncratic risk in the restaurant industry. The study also explores whether brand diversification magnifies the risk reduction effect of CSR in the restaurant industry.

The study uses an unbalanced panel of 274 firm-year observations for 43 restaurant firms over the period 1995–2015. Models are estimated via fixed effect regression with robust standard errors.

The study finds that CSR involvement reduces idiosyncratic risk and this risk reduction is intensified when restaurant firms operate a portfolio of brands.

The study’s findings are limited to restaurant industry, therefore, generalization of the findings to other industries requires delicate care. Brand diversification is a simple brand count due to a lack of brand sales data.

CSR activities are not cost burden for restaurant firms. Indeed, CSR could be a viable strategy to reduce the volatility in future expected cash flows, hence the idiosyncratic risk. This risk reduction could help owners/managers access to capital with lower cost. Moreover, the study suggests that CSR practices should not be implemented in isolation from firm marketing strategy such as portfolio of brands.

Although prior hospitality research puts forth some evidence using systematic risk as the measure of firm risk, this measure may not best suit the purpose in CSR context given that CSR is a direct, firm-specific strategy. Hence, the current study provides both new evidence with firm-specific, idiosyncratic risk and introduces an important contingency situation when the risk reduction effect of CSR would become more profound for restaurant firms.

This study aims to investigate not only the association between corporate environmental, social and governance (ESG) performance and the cost of capital (COC) but also its impact on the company’s idiosyncratic risk. Further, it highlights that companies could manage their risk through sustainability initiatives to achieve a cheaper cost of financing.

Using an extensive Australian sample for the 2007–2017 period from the Bloomberg database, this study conducts a panel (data) regression analysis to examine the impact of the corporate ESG performance disclosure score on the COC and idiosyncratic risk. The robustness of the findings is tested and confirmed in several ways, including a sensitivity test. Furthermore, the instrumental variable approach is used to address potential endogeneity issues.

A favourable association was found between a higher corporate ESG performance disclosure score and cheaper resources financing. The evidence also supports the mitigating impact of corporate ESG performance disclosure score on the company’s idiosyncratic risk as a strong complement for access to a cheaper source of funds. The findings strongly support both hypotheses of this study.

This study extends the current body of knowledge addressing these associations. Further studies should expand the investigation to non-listed or small and medium-sized companies. Additionally, future studies could contribute to the literature by including other moderating variables, such as a country’s cultural environment and diverse economic situations.

An extensive literature review suggests that this study, to the best of the authors’ knowledge, is the first that simultaneously evaluates the impact of corporate ESG performance disclosure on a company’s COC and idiosyncratic risk.

This study is the first to examine the role of idiosyncratic risk in the pricing of European real estate equities. The capital asset pricing model predicts that in equilibrium, investors should hold the market portfolio. As a result, investors should only be rewarded for carrying undiversifiable systematic risk and not for diversifiable idiosyncratic risk. The study is adding to the growing body of countering studies by first examining time trends of idiosyncratic risk and subsequently the pricing of idiosyncratic risk in European real estate equities. The paper aims to discuss these issues.

The study analyses 293 real estate equities from 16 European capital markets over the 1991-2011 period. The framework of Fama and MacBeth is employed. Regressions of the cross-section of expected equity excess returns on idiosyncratic risk and other firm characteristics such as beta, size, book-to-market equity (BE/ME), momentum, liquidity and co-skewness are performed. Due to recent evidence on the conditional pricing of European real estate equities, the pricing is also investigated using the conditional framework of Pettengill et al. Either realised or expected idiosyncratic volatility forecasted using a set of exponential generalized autoregressive conditional heteroskedasticity models are employed.

The initial analysis of time trends in idiosyncratic risk reveals that while the early 1990s are characterised by both high total and idiosyncratic volatility, a strong downward trend emerged in 1992 which was only interrupted by the burst of the dotcom bubble and the 9/11 attacks along with the global financial and economic crisis. The largest part of total volatility is idiosyncratic and therefore firm-specific in nature. Simple cross-correlations indicate that high beta, small size, high BE/ME, low momentum, low liquidity and high co-skewness equities have higher idiosyncratic risk. While size and BE/ME are priced unconditionally from 1991 to 2011, both measures of idiosyncratic risk fail to achieve significance at reasonable levels. However, once conditioned on the general equity market or real estate equity market, a strong positive relationship between idiosyncratic risk and expected returns emerges in up-markets, while the opposite relationship exists in down-markets. The relationship is robust to firm-specific factors and a series of robustness checks.

The results show that ignoring the conditional relationship between idiosyncratic risk and returns might result in the false realisation that idiosyncratic risk does not matter in the pricing of risky (real estate) assets.

This study is the first to examine the role of idiosyncratic risk in the pricing of European real estate equities. The study reveals differences in the pricing of European real estate equities and US REITs. The study highlights that ignoring the conditional relationship between idiosyncratic risk and returns might result in the false realisation that idiosyncratic risk does not matter in the pricing of risky assets.

The purpose of this paper is to contribute to the existing stock return predictability and idiosyncratic risk literature by examining the relationship between stock returns and components derived from the decomposition of stock returns variance at the portfolio and firm levels.

A theoretical model is used to decompose the variance of stock returns into two volatility and two covariance terms by using a conditional Fama-French three-factor model. This study adopts portfolio analysis and Fama-MacBeth cross-sectional regression to examine the relationship between components of idiosyncratic risk and expected stock returns.

The portfolio analysis results show that volatility terms are negatively related to expected stock returns, and alpha risk has the most significant relationship with stock returns. On the contrary, covariance terms have positive relationships with expected stock returns at the portfolio level. Furthermore, the results of the Fama-MacBeth cross-sectional regression show that only alpha risk can explain variations in stock returns at the firm level. Another finding is that when volatility and covariance terms are excluded from idiosyncratic volatility, the relation between idiosyncratic volatility and stock returns becomes weak at the portfolio level and disappears at the firm level.

This is the first study that examines the relations between all the components of idiosyncratic risk and expected stock returns in equal-weighted and value-weighted portfolios. This research also suggests covariance terms of idiosyncratic volatility as new predictors of stock returns at the portfolio level. Moreover, this paper contributes to the idiosyncratic risk literature by examining whether all the four additional components explain all the systematic patterns included in the unconditional idiosyncratic risk.

This paper aims to enrich the scope of the influence of media reports on the stock risk, and it also provides a path to support the research on the relationship between media reports and idiosyncratic risks in the stock market.

The authors select financial restatement samples of listed companies in China from Jan 2015 to Dec 2017 to explore the impact of the financial restatement on the idiosyncratic risk of stocks. Further, the financial restatement that has more media attention may play a more significant role in promoting the idiosyncratic risk.

The authors found that the financial restatement of listed companies has a significant positive effect on the idiosyncratic risk of stocks. Specifically, the idiosyncratic risk changed five months before the restatement. After the restatement, the idiosyncratic risk increased by 83.47 in five days then decreased slowly, which lasted about one year. The restatement caused by sensitive issues and legal issues has a greater impact on the idiosyncratic risk. Both current restatement and delayed restatements will increase the idiosyncratic risk of stocks, but the impact of the latter is higher than the former.

Possible deficiencies in the paper are that the number of restatements caused by major accounting errors is low. Therefore, no regular conclusions were drawn on the impact of the financial restatement caused by major accounting errors.

The conclusions provide a basis for targeted supervisory measures on the restatements of listed companies. The increase in financial restatements is closely related to the lack of governance mechanisms in the stock market. For investors, although the mystery of idiosyncratic volatility exists significantly in the market, the company's valuation level will affect the relationship between the idiosyncratic risk and expected return. Investors should pay attention to the intrinsic value of the company and should not blindly pursue stocks with a low idiosyncratic risk.

These conclusions may enrich the scope of the influence of media reports on the stock risk and also provide a path to support the research on the relationship between media reports and idiosyncratic risks in the capital market.

This paper jointly examines how firm size and idiosyncratic risk impact momentum returns.

Using regression analysis, the authors investigate how firm size and idiosyncratic risk impact price momentum. The authors review firm price data in 25 country markets in the Thomson Financial Datastream database from 1979 to 2009.

This study’s findings suggest price momentum is more significant among stocks with smaller size and higher idiosyncratic risk. The authors find that winner and loser portfolios have significantly smaller size and higher idiosyncratic risk than portfolios in the middle quintiles.

This study’s results are consistent with the notion that firm size matters in price momentum and mispricing is greatest for small firms because of the greater risk potential to arbitrageurs. In addition, this finding that firms with higher idiosyncratic risk have greater price momentum supports the idea that investors underreact to firm-specific information.

This work finds evidence that investors underreact to firm-specific information. As such, these findings are of particular interest for investors looking to exploit opportunities for abnormal returns through price momentum trading.

This paper jointly examines the effects of firm size and idiosyncratic risk on momentum returns. This investigation considers these effects in the global markets. This work adds to the research base by illustrating that both winner and loser portfolios have significantly smaller size and higher idiosyncratic risk than portfolios in the middle quintiles. Also unique to this study, the authors capture the time-variation of expected IdioRisk and the asymmetric effects of volatility by using an exponential general autoregressive conditional heteroskedastic (EGARCH) model to calculate conditional idiosyncratic risk.

This paper aims to investigate whether idiosyncratic volatility is a priced risk factor in the Australian stock market.

The authors use the change in idiosyncratic volatility around acquisition announcements and the related stock price revaluation to test whether the idiosyncratic risk is priced. If the idiosyncratic risk is priced, increases (decreases) in idiosyncratic volatility should be associated with decreases (increases) in the acquirer’s stock price, as the latter’s future cash flows are discounted at a higher (lower) rate. The sample consists of 2,656 completed acquisitions by Australian listed firms over the period January 1990 to October 2014 for which deal value represents more than 5 per cent of the acquirer’s market value.

Increases (decreases) in idiosyncratic risk are associated with significant decreases (increases) in firm value. This negative relationship is robust to the presence of outliers; is unaffected by the incidence of the 2007-2008 financial crisis; holds using alternative measures of idiosyncratic risk; and is more significant after excluding the resources sector. Firms with a higher idiosyncratic risk prior to the acquisition, and firms avoiding stock to pay for the acquisition, experience a more significant stock price increase in relation to a decrease in idiosyncratic risk.

Considering the small size of the Australian economy, investors may have less scope to mitigate idiosyncratic risk. As a consequence, idiosyncratic risk is associated with the positive excess return, contrary to what standard asset pricing theory assumes. The results support Merton’s (1987) hypothesis that investors are exposed to idiosyncratic risk due to imperfect portfolio diversification and receive compensation for bearing that risk.

The pricing of idiosyncratic risk may also explain why the Australian stock market has historically offered a high equity risk premium. A practical implication would be for international investors to take advantage of the diversification constraints of local investors to capture higher risk premiums and achieve superior returns.

While prior studies demonstrate that stocks with higher idiosyncratic risk are associated with higher subsequent returns, the authors show that an increase in idiosyncratic risk is associated with a decrease in stock prices using acquisition announcements as shocks to a firm’s idiosyncratic risk. In other words, the results arise from within-firm variations rather than from cross-sectional differences in stock returns.