The Effect of Key Audit Matters on Investor Sentiment in Companies Listed on the Tehran Stock Exchange

Authors

  • Maral Ezadpanah * Department of Accounting, Shahid Ashrafi Esfahani University, Isfahan, Iran.
  • Maryam Sadeghi Department of Accounting, Shahid Ashrafi Esfahani University, Isfahan, Iran.

https://doi.org/10.22105/aaa.v3i2.97

Abstract

Investor Sentiment (SENT) is recognized as one of the key determinants in financial decision-making, influencing asset pricing and market volatility. This SENT, which reflects investors’ irrational optimism or pessimism toward firm stocks, can lead to deviations of market prices from their intrinsic values. Prior studies indicate that SENT is affected not only by fundamental factors but also by psychological and behavioral variables. One such factor is Key Audit Matters (KAMs). As a component of the auditor’s report, KAMs provide information regarding significant audit risks, which may influence investors’ judgments. Investors’ reactions to these disclosures may reflect their level of confidence in the transparency and reliability of financial reporting. Accordingly, the objective of this study is to examine the effect of KAMs on SENT in companies listed on the Tehran Stock Exchange (TSE). To achieve this objective, a hypothesis was developed. The study sample consists of 119 firms listed on the TSE over the period 2019–2023. To test the hypothesis, a multiple regression model based on panel data was employed. The empirical results indicate that KAMs have a positive and significant effect on SENT. This finding suggests that the transparent disclosure of KAMs enhances investors’ confidence and optimism, thereby significantly strengthening SENT.

Keywords:

Investor sentiment, Key audit matters, Behavioral biases

References

  1. [1] Zaeifosadat, S. R., & Rafiei, S. (2025). The effect of governance quality on foreign direct investment attraction in Iran: Time series analysis with ARDL approach. Financial and banking strategic studies, 3(2), 135–147. (In Persian). https://doi.org/10.22105/fbs.2025.544433.1171
  2. [2] Seraj, S., & Bahrami, M. (2024). Investigating the impact of financial reporting readability on companies’ investment decisions. Financial and banking strategic studies, 2(2), 150–162. (In Persian). https://doi.org/10.22105/fbs.2024.465236.1099
  3. [3] Faezi, B. (2025). Investigating the effect of corporate governance on investment sensitivity to changes in cash flow of companies listed in the Tehran Stock Exchange. Strategic studies in financial management and insurance, 2(1), 50–66. (In Persian). https://doi.org/10.22105/ssfmi.v2i1.71
  4. [4] Baker, M., & Wurgler, J. (2007). Investor sentiment in the stock market. Journal of economic perspectives, 21(2), 129–151. https://doi.org/10.1257/jep.21.2.129
  5. [5] Wang, W., Su, C., & Duxbury, D. (2021). Investor sentiment and stock returns: Global evidence. Journal of empirical finance, 63, 365–391. https://doi.org/10.1016/j.jempfin.2021.07.010
  6. [6] Czerney, K., Schmidt, J. J., & Thompson, A. M. (2019). Do investors respond to explanatory language included in unqualified audit reports? Contemporary accounting research, 36(1), 198–229. https://doi.org/10.1111/1911-3846.12425
  7. [7] Gutierrez, E., Minutti Meza, M., Tatum, K. W., & Vulcheva, M. (2018). Consequences of adopting an expanded auditor’s report in the United Kingdom. Review of accounting studies, 23(4), 1543–1587. https://doi.org/10.1007/s11142-018-9464-0
  8. [8] Lennox, C. S., Schmidt, J. J., & Thompson, A. (2018). Is the expanded model of audit reporting informative to investors? Evidence from the UK. Social science research network. https://doi.org/10.2139/ssrn.2619785
  9. [9] Yang, H. (2021). The impact of the disclosure of key audit matters on market reaction and audit quality, an empirical analysis from Spanish IBEX 35. Master degree in accounting and taxation. https://hdl.handle.net/2445/179368
  10. [10] Li, H., Hay, D., & Lau, D. (2019). Assessing the impact of the new auditor’s report. Pacific accounting review, 31(1), 110–132. https://doi.org/10.1108/PAR-02-2018-0011
  11. [11] Eskandar, H., & Safdell, E. (2024). Process of disclosing key audit matters in audit report: Grounded theory. Empirical accounting research, 14(3), 45–74. (In Persian). https://doi.org/10.22051/jera.2024.47437.3258
  12. [12] Kitiwong, W., Ekasingh, E., & Sarapaivanich, N. (2025). Analysis of non English key audit matters: Do key audit matters influence investor sentiment? Journal of international accounting, auditing and taxation, 58, 100670. https://doi.org/10.1016/j.intaccaudtax.2024.100670
  13. [13] Kachelmeier, S. J., Rimkus, D., Schmidt, J. J., & Valentine, K. (2020). The forewarning effect of critical audit matter disclosures involving measurement uncertainty. Contemporary accounting research, 37(4), 2186–2212.
  14. [14] Klevak, J., Livnat, J., Pei, D., & Suslava, K. (2023). Critical audit matters: Possible market misinterpretation. Auditing: a journal of practice & theory, 42(3), 45–70. https://doi.org/10.2308/AJPT-2020-113
  15. [15] Baker, M., & Wurgler, J. (2006). Investor sentiment and the cross section of stock returns. The journal of finance, 61(4), 1645–1680. https://doi.org/10.1111/j.1540-6261.2006.00885.x
  16. [16] Changsheng, H., & Yongfeng, W. (2012). Investor sentiment and assets valuation. Systems engineering procedia, 3, 166–171. https://doi.org/10.1016/j.sepro.2011.11.023
  17. [17] Jafarinasab Kermani, N. (2018). Key audit matters. Auditor journal, (96), 44–53. (In Persian). https://www.magiran.com/p1883295
  18. [18] Hashemi, F., Mousavi Shiri, M., Mohammadi, M., & N. A. M. (2026). Evaluation of factors affecting portfolio optimization in financial markets based on the random forest method. Modern research in performance evaluation, 4(4), 309–333. (In Persian). https://doi.org/10.22105/mrpe.2026.243089
  19. [19] Kermani, N. J. N., Mollanazari, M., Rahmani, A., & Azizkhani, M. (2019). Identification and disclosure of key audit matters in the audit report outlook of Iranian. (In Persian). https://hdl.handle.net/102.100.100/557667
  20. [20] Noormohammadi, S. (2025). The relationship between environmental, social and governance performance and investment efficiency with an emphasis on business strategy. Strategic studies in financial management and insurance, 2(4), 282–295. (In Persian). https://doi.org/10.22105/ssfmi.v2i4.95
  21. [21] Ghaemi, M. H., Baraz, M., & Shahsavand, M. (2024). Content analysis and determinants of key audit matter disclosure: The first year of ISA 701 implementation in Iran. Accounting and auditing reviews, 31(1), 1540181. (In Persian). https://doi.org/10.22059/ACCTGREV.2024.369541.1008892
  22. [22] Zhai, H., Lu, M., Shan, Y., Liu, Q., & Zhao, Y. (2021). Key audit matters and stock price synchronicity: Evidence from a quasi natural experiment in China. International review of financial analysis, 75, 101747. https://doi.org/10.1016/j.irfa.2021.101747
  23. [23] Kitiwong, W., & Srijunpetch, S. (2019). Cultural influences on the disclosures of key audit matters. Journal of accounting profession, 15(46), 45–63. http://www.jap.tbs.tu.ac.th/files/Article/Jap46/Full/JAP46WeeSil.pdf
  24. [24] Zeng, Y., Zhang, J. H., Zhang, J., & Zhang, M. (2021). Key audit matters reports in China: their descriptions and implications of audit quality. Accounting horizons, 35(2), 167–192. https://doi.org/10.2308/HORIZONS-19-189
  25. [25] Pinto, I., & Morais, A. I. (2019). What matters in disclosures of key audit matters: Evidence from Europe. Journal of international financial management & accounting, 30(2), 145–162.
  26. [26] Srisuwan, P., Swatdikun, T., Pathak, S., Surbakti, L. P., & Saramolee, A. (2024). Factors influencing key audit matter reporting in the stock exchange of thailand: Empirical evidence from 2016--2020 data. Journal of risk and financial management, 17(11), 512. https://doi.org/10.3390/jrfm17110512
  27. [27] Alduneibat, K. A. (2024). Factors affecting the level of key audit matters disclosure: Evidence from Jordan. Jordan journal of business administration, 20(2). https://doi.org/10.35516/jjba.v20i2.2008
  28. [28] He, Y. (2024). A study of factors influencing investor expectations in the capital market. SHS web of conferences (Vol. 188, p. 1020). EDP Sciences. https://doi.org/10.1051/shsconf/202418801020
  29. [29] Hoang, H., Moroney, R., Phang, S. Y., & Xiao, X. (2023). Investor reactions to key audit matters: Financial and non financial contexts. Accounting & finance, 63(3), 3325–3349. https://doi.org/10.1111/acfi.13041
  30. [30] Liu, W. P., Yen, M. F., & Wu, T. Y. (2022). Report users’ perceived sentiments of key audit matters and firm performance: Evidence from a deep learning based natural language processing approach. Journal of information systems, 36(3), 191–209. https://doi.org/10.2308/ISYS-2020-061
  31. [31] Wuttichindanon, S., & Issarawornrawanich, P. (2020). Determining factors of key audit matter disclosure in Thailand. Pacific accounting review, 32(4), 563–584. https://doi.org/10.1108/PAR-01-2020-0004
  32. [32] Altawalbeh, M., & Alhajaya, M. (2019). The investors reaction to the disclosure of key audit matters: Empirical evidence from Jordan. International business research, 12(3), 50–57. https://doi.org/10.5539/ibr.v12n3p50
  33. [33] Heidari, Z., & Meshayekh, S. (2025). The consequences of disclosing major audit matters on investors’ judgment and decision-making. Empirical accounting research, 15(1), 53–84. (In Persian). https://doi.org/10.22051/jera.2025.48809.3317
  34. [34] Safari, F., Rahnama, F., & allah Talebnia, G. (2024). Explaining the pattern of audit report on investor behavior with emphasis on behavioral biases. (In Persian). https://doi.org/10.22034/jpar.2023.2012577.1225
  35. [35] Akramiyarfi, N., Rezazadeh, J., & Aghaei, M. A. (2024). The effect of emphasis of matter paragraphs on investor behavior. Journal of new research approaches in management and accounting quarterly, 8(93), 894–916. (In Persian). https://www.magiran.com/p2773111
  36. [36] Rahimi, A., Shamsoldini, K., & Mehrabadi, M. (2023). The role and importance of audit report disclosure on investor reactions. Proceedings of the 8th international conference on management, economics and industry-based accounting studies, tehran. Association of management and technology development engineering. (In Persian). https://civilica.com/doc/1758810
  37. [37] Shoja, E., Ahadi Sorkani, S. Y., & Hosseini, S. A. (2022). The role and importance of increasing audit report disclosures in investment decisions of professional and non professional investors using a fuzzy delphi approach. Financial accounting and auditing research, 14(56), 51–68. (In Persian). https://doi.org/10.30495/faar.2022.698379
  38. [38] Abaspour Thani, A., Hajiha, Z., Haji, R., & Najafi Moghaddam, A. (2022). Investigating the effect of key audit matter disclosure on reducing corporate business failure in capital markets. Financial accounting knowledge, 9(4), 219–250. (In Persian). https://doi.org/10.30479/jfak.2021.16048.2906
  39. [39] Heirani, F., Alinajadrahmatabad, M., & Hemmatian, O. (2021). Examining key audit issues on investors’ perceptions of the credibility of management reporting. In proceedings of the 4th national conference on development of new technologies in management, accounting and computer science (tehran, iran). (p. 22). Organizing committee of the conference. (In Persian). https://civilica.com/doc/1317312/
  40. [40] Kaviani, M., & Jafari, M. (2025). Audit quality and earnings management based on loan loss provisions: Evidence from Iranian capital market banks. Transactions on quantitative finance and beyond, 2(1), 1–7. (In Persian). https://doi.org/10.22105/tqfb.v2i1.44
  41. [41] Goudarzi Farahani, Y., Morsali Arzanagh, Z., Abbasi, E., & Karkhaneh, R. (2025). Measuring the relationship between investor index and research and development expenses with company financial performance. Scientific research journal of investment knowledge, 14(54), 229–248. (In Persian). https://doi.org/10.30495/jik.2025.23538
  42. [42] Rhodes Kropf, M., Robinson, D. T., & Viswanathan, S. (2005). Valuation waves and merger activity: The empirical evidence. Journal of financial economics, 77(3), 561–603. https://doi.org/10.1016/j.jfineco.2004.06.015
  43. [43] Kitiwong, W., & Sarapaivanich, N. (2020). Consequences of the implementation of expanded audit reports with key audit matters (KAMs) on audit quality. Managerial auditing journal, 35(8), 1095–1119. https://doi.org/10.1108/MAJ-09-2019-2410
  44. [44] Rahman, M. M., Saima, F. N., & Jahan, K. (2020). The impact of financial leverage on firm’s profitability: An empirical evidence from listed textile firms of Bangladesh. Asian journal of business environment, 10(2), 23–31. https://doi.org/10.13106/jbees.2020.vol10.no2.23
  45. [45] Rahaman, M. M., & Bhuiyan, M. B. U. (2024). Audit report lag and key audit matters in Australia. International journal of disclosure and governance, 22(2), 532–554. Springer. https://doi.org/10.1057/s41310-024-00251-6

Published

2026-06-19

Issue

Vol. 3 No. 2 (2026): Accounting and Auditing with Applications (AAA)

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Articles

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How to Cite

Ezadpanah, M. ., & Sadeghi, M. . (2026). The Effect of Key Audit Matters on Investor Sentiment in Companies Listed on the Tehran Stock Exchange. Accounting and Auditing With Applications , 3(2), 136-151. https://doi.org/10.22105/aaa.v3i2.97

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