نوع مقاله : مقاله علمی پژوهشی
نویسندگان
1 دانشجوی دکتری، گروه مهندسی مالی، دانشکده مدیریت و حسابداری، واحد قزوین، دانشگاه آزاد اسلامی، قزوین، ایران.
2 دانشیار، گروه مدیریت مالی، دانشکده مدیریت، واحد قزوین، دانشگاه آزاد اسلامی، قزوین، ایران.
3 استادیار، گروه مدیریت مالی، دانشکده مدیریت، واحد قزوین، دانشگاه آزاد اسلامی، قزوین، ایران.
4 استادیار، گروه ریاضی و آمار، دانشکده مدیریت، واحد قزوین، دانشگاه آزاد اسلامی، قزوین، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Objective
The purpose of the present study was to investigate the impact of financial flexibility and managerial ability on the stock return volatility moderated by default risk for the companies listed on the Tehran Stock Exchange using linear and non-linear (a dynamic behavior).
Methods
To this end, financial flexibility was measured using the average of five measures (cash to total assets, current assets to total assets, tangible assets to total assets, intangible assets to total assets and capital to total assets), managerial ability was measured using Demerjian (2012)'s data envelopment analysis and corporate default risk was measured using Fulmer H score model. The statistical population of the present study comprised all companies listed on the Tehran Stock Exchange during the years 2013-2022. A sample of 82 companies was selected for the study. The research hypotheses were tested using a linear regression model.
Results
The findings showed that financial flexibility and managerial ability have a significant impact on the stock return volatility and that the corporate default risk moderates the impact of financial flexibility and managerial ability on the stock return volatility. In addition, the study of the model using a non-linear method showed that the Lyapunov exponent (LyE) was positive for all the variables. It shows that the system variables separate at a high rate in infinitesimally close trajectories, and this results in a chaotic system. It can be concluded that financial flexibility, managerial ability, and default risk have an impact on stock return volatility; however, these independent and moderating variables may have no impact on the dependent variable in the future. On the other hand, the entropy coefficients of the sample show that financial flexibility×managerial ability does not predict the variation in the stock return volatility; however, financial flexibility×default risk predicts that variation. The DFA alpha coefficient indicates that financial flexibility, managerial ability, financial flexibility × default risk, and managerial ability × default risk have strong correlations with stock return volatility. The correlation dimension reveals that financial flexibility and managerial ability have the lowest and highest correlations, respectively, with stock return volatility.
Conclusion
Given the findings of the study, it can be concluded that the current year's stock return volatility of the companies listed on the Tehran Stock Exchange increases with their previous year's financial flexibility. Moreover, the impact of managerial ability on the current year's stock return volatility of these companies decreases with their default risk.
کلیدواژهها [English]