Kilit Denetim Konularının Borsa Göstergeleri Üzerindeki Etkilerinin Ortaya Çıkarılması: PCA ve Eğrisel Regresyonun Etkinliği

Yıl 2025, Cilt: 20 Sayı: 1, 237 - 254

Murat Kurtlar

Öz

Bu çalışma, Borsa İstanbul’da işlem gören 95 şirketin kilit denetim konularının borsa performansı üzerindeki etkilerini incelemektedir. Maddi Duran Varlıklar, Maddi Olmayan Duran Varlıklar, Stoklar, Hasılat, Ticari Alacaklar, Ticari Borçlar ve Nakit gibi kilit denetim konuları, fiyat kazanç oranı, piyasa değeri/defter değeri oranı ve hisse başına kazanç ile ilişkilendirilmiştir. Kilit denetim konuları arasındaki yüksek korelasyon nedeniyle PCA ile boyut azaltımı yapılmıştır. Doğrusal ve eğrisel regresyon analizleri sonucunda, eğrisel modelin daha düşük MSE ve MAE değerleri ve anlamlı p-değerleri ile daha yüksek doğruluk ve uyum sağladığı tespit edilmiştir.

Anahtar Kelimeler

Kilit Denetim Konuları, Boyutsallık Azaltma, Regresyon Modelleri

Unveiling the Effects of Key Audit Matters on Stock Market Indicators: The Effectiveness of PCA and Curvilinear Regression

Öz

This study examines the effects of key audit matters on the stock market performance of 95 companies traded on Borsa Istanbul. Key audit matters such as Tangible Fixed Assets, Intangible Fixed Assets, Inventories, Revenue, Trade Receivables, Trade Payables and Cash are associated with the price-earnings ratio, market value/book value ratio and earnings per share. Due to the high correlation between key audit matters, dimensionality reduction has been performed using PCA. As a result of linear and curvilinear regression analyses, it has been determined that the curvilinear model provided higher accuracy and fit with lower MSE and MAE values and significant p-values.

Anahtar Kelimeler

Key Audit Matters, Dimensionality Reduction, Regression Models

Kaynakça

• 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
• Christensen, B. E., Glover, S. M., & Wolfe, C. J. (2014). Do critical audit matter paragraphs in the audit report change nonprofessional investors’ decision to invest? Auditing: A Journal of Practice & Theory, 33(4), 71–93. https://doi.org/10.2308/ajpt-50793
• Daultrey, S. (1976). Principal components analysis (Vol. 8, p. 50). Norwich: Geo Abstracts Limited.
• Ezekiel, M. (1924). A method of handling curvilinear correlation for any number of variables. Journal of the American Statistical Association, 19(148), 431-453. https://www.jstor.org/stable/2281561
• Gold, A., Heilmann, M., Pott, C., & Rematzki, J. (2020). Do key audit matters impact financial reporting behavior? International Journal of Auditing, 24(2), 232-244. https://doi.org/10.1111/ijau.12190
• Gu, S., & Ncuti, D. (2020). Market behavior to the introduction of key audit matters: the case of shares of cross-listed companies in China. IOSR Journal of Economics and Finance, 11, 39-45. https://doi.org/10.9790/5933-1104033945
• 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
• Hall, P., & Hosseini-Nasab, M. (2006). On properties of functional principal components analysis. Journal of the Royal Statistical Society Series B: Statistical Methodology, 68(1), 109-126. https://doi.org/10.1111/j.1467-9868.2005.00535.x
• Holland, S. M. (2008). Principal components analysis (PCA). Department of Geology, University of Georgia, Athens, GA, 30602, 2501. http://stratigrafia.org/8370/handouts/pcaTutorial.pdf
• International Standard on Auditing (ISA) 701 https://www.ifac.org/_flysystem/azure-private/publications/files/Proposed%20ISA%20701%20(Revised)-final.pdf
• International Auditing and Assurance Standards Board (IAASB). https://www.iaasb.org/ Ittarat, P., & Tangpinyoputtikhun, Y. (2019). The incremental information content of key audit matters on stock returns: evidence from companies in the stock exchange of Thailand (Doctoral dissertation, Mahasarakham University).
• Li, F. (2011). Textual analysis of corporate disclosures: a survey of the literature. Journal of Accounting Literature, 29, 143–165. https://www.cuhk.edu.hk/acy2/workshop/20110215FengLI/Paper1.pdf
• Liao, L., Minutti-Meza, M., Zhang, Y., & Zou, Y. (2019). Consequences of the adoption of the expanded auditor’s report: evidence from Hong Kong. University of Miami Business School Research Paper No. 3392449. Available at SSRN: https://ssrn.com/ abstract=3392449 or https://doi.org/10.2139/ssrn.3392449.
• Lin, H. L., & Yen, A. R. (2022). Auditor rotation, key audit matter disclosures, and financial reporting quality. Advances in Accounting, 57, 100594. https://doi.org/10.1016/j.adiac.2022.100594
• 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
• Mamcarczyk, M., Popławski, Ł., & Zieniuk, P. (2020). Key audit matters in the auditor's reports on the example of European mining companies. Acta Montanistica Slovaca, 25(4). DOI: 10.46544/AMS.v25i4.02
• Moroney, R., Phang, S. Y., & Xiao, X. (2021). When do investors value key audit matters? European Accounting Review, 30(1), 63-82. https://doi.org/10.1080/09638180.2020.1733040
• Public Disclosure Platform (PDP). https://www.kap.org.tr/tr/
• Public Oversight Accounting and Auditing Standards Authority. https://www.kgk.gov.tr/Home Velte, P., & Issa, J. (2019). The impact of key audit matter (KAM) disclosure in audit reports on stakeholders’ reactions: a literature review. Problems and Perspectives in Management, 17(3), 323-341. https://pdfs.semanticscholar.org/ad0b/f9031756114f15c72cd6e98ba8fe5ca9d90e.pdf
• Weisberg, S. (2005). Applied linear regression (Vol. 528). John Wiley & Sons.
• 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