Purpose – Success in corporate relative performance is one of the factors for the growth and durability of firms. Since the relative performance is a function of managers’ decisions and such decisions are under the influence of behavioral and psychological characteristics, this paper aims to assess the managers’ and auditors’ narcissism’s effect on the management team’s stability relative to corporate performance. Design/methodology/approach – This paper has used the signature magnitude for examining narcissism and the regression model of Jenter and Kanaan (2015) for assessing relative corporate performance. The logistic regression is used to test the model of the management team’s stability, and the multivariate regression is used to test the model of relative corporate performance. Research hypotheses were also examined using a sample of 768 listed year-companies on the Tehran Stock Exchange during 2012–2017 and by employing a panel data approach and fixed effects method. Findings – The obtained results show a negative and significant relationship between managers’ and auditors’ narcissism and the management team’s stability. The relationship between the narcissism of managers and auditors and relative corporate performance is positive and significant. Moreover, managers’ narcissism positively and significantly impacts the relationship between auditors’ narcissism and team management stability. A negative and significant relationship is evident between auditors’ narcissism and relative corporate performance. Originality/value – This study’s results can identify the effect of psychological components such as narcissism on people’s performance by directing and influencing their decisions. Many studies have been conducted on narcissism, but none of them have examined the impact auditors’ and managers’ narcissism has on the management team’s stability and the corporate relative performance. Therefore, considering the importance of success in the corporate relative performance and benefits of the management team’s stability, this study’s results can reveal the importance of such features in accounting research. Also, the results of this research can make it important to know more about financial behavioral theory.

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