M.A. Thesis:

Abnormal Audit Fees and the risk of stock price crash

The main purpose of this study is to investigate the auditor's unusual fee and the risk of falling stock prices based on capital market evidence. The present study is applied in terms of purpose, quantitative in terms of data type, deductive-inductive in terms of execution logic and descriptive-correlation in terms of execution. In this research, various sources have been used, including books, domestic and foreign articles, and the Internet. Relationships between variables have been tested using correlation and logistic regression models. First, the collected data were classified in Excel software and after organizing and calculating the variables, Stata statistical software was used to analyze the information. In order to test the research hypotheses, a statistical sample consisting of 148 companies listed in selected industries from the Tehran Stock Exchange during the years 2013-2019 has been studied. In this research, the information of the fiscal year 2020 as the next year and the information of the fiscal year 2012 as the previous year have been used in calculations. Based on statistical analysis and regression estimates, the results of examining the hypotheses at the expected error level (five hundred percent) showed: There is a significant relationship between audit fees and the risk of falling stock prices. There is a significant relationship between abnormal audit fees and the risk of falling stock prices.

Keywords: Audit Fees, Abnormal Audit Fees , Risk of Stock Price Crash.