بررسی تاثیر کیفیت افشا و افشای داوطلبانه اطلاعات بر عدم تقارن اطلاعاتی در بورس اوراق بهادار تهران

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار گروه مدیریت پیام نور کرمان

2 دانشجوی دکتری مالی، دانشکده مدیریت و اقتصاد، دانشگاه سیستان و بلوچستان

3 دانشجوی کارشناسی ارشد مدیریت دولتی، دانشگاه پیام نور کرمان

4 کارشناس ارشد حسابداری، مدرس دانشگاه علمی کاربردی زاهدان

5 کارشناس ارشد مدیریت مالی ، مدرس دانشگاه پیام نور زاهدان

چکیده

هدف پژوهش حاضر، بررسی تأثیر کیفیت افشا و افشای داوطلبانه اطلاعات بر عدم تقارن اطلاعاتی شرکت‏های پذیرفته شده در بورس اوراق بهادار تهران می­باشد. به منظور دستیابی به این هدف، با در نظر گرفتن شرایطی، 84 شرکت در بازه زمانی 1385 تا 1395، مورد بررسی قرار گرفت و 6 فرضیه فرعی طراحی و آزمون شد. در این پژوهش جهت محاسبه عدم تقارن به طور هم زمان از سه معیار دامنه تفاوت قیمت پیشنهادی خرید و فروش، نقدشوندگی سهام و خطای پیش بینی استفاده گردید. یافته های پژوهش حاکی از وجود رابطه معنادار بین کیفیت افشا و افشای داوطلبانه اطلاعات با نقدشوندگی سهام می­باشد، اما بین کیفیت افشا و افشای داوطلبانه اطلاعات با دو معیار دیگر رابطه معناداری مشاهده نگردید. با توجه به نتایج حاصله پیشنهاد می‌گردد که اطلاعات منتشره از طرف شرکت‌ها به صورت شفافی ارائه گردند تا از این طریق سرمایه‌گذاران میل بیشتری به سرمایه‌گذاری در اوراق بهادار داشته باشند. بدین جهت نقش سازمان بورس در ملزم کردن شرکت­ها برای ارائه اطلاعات شفاف بیش از پیش اهمیت پیدا می­کند.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating the Impact of Disclosure Quality and Voluntary Disclosure on Information Asymmetry in Tehran Stock Exchange

نویسندگان [English]

  • Hamid Tabeli 1
  • Moslem Moradzadeh 2
  • Masud Kashi 3
  • Zohreh Derohi 4
  • Seyed Vahid Hosseini Tabatabaei 5
1 Associate Professor in management department, Payam Noor University of Kerman
2 Ph.D. Student in finance, University of Sistan and Baluchestan
3 M.A. Student in management, Payam Noor University of Kerman
4 M.A. accounting, University of Applied Science and Technology
5 M.A. financial management, Payam Noor University
چکیده [English]

Abstract
The current study aimed at investigating the impact of disclosure quality and voluntary disclosure on Information asymmetry of the companies listed in Tehran Stock Exchange. Accordingly, statistical sample including 84 companies listed in Tehran Stock Exchange were studied in a time period of 2006 to early 2016 using Panel regression. In this study, the relationship between voluntary disclosure and Information asymmetry criteria including the domain of difference of bid and offer prices, cash stock and the error of predicting interest as well as the relationship between the rate of disclosure quality and Information asymmetry were examined. In order to examine the normality of data, Kolmogorov-Smirnov Test was used. Significance level of the test for the variables of the domain of difference of bid and offer prices, the error of predicting interest, growth, return on assets and financial leverage was normalized using Johnson Method. Finally, the model was estimated and the results of the study showed a meaningful relationship between voluntary disclosure of information and the rate of disclosure quality with cash stock, but there was not a meaningful relationship between voluntary disclosure of information and the rate of disclosure quality with two other criteria. Based on the results obtained, the released information from companies should be presented orally so that investors could have more tendencies to invest in Stock Exchange. Therefore, the role of Stock Exchange in compelling companies to present clear information gets more and more important
 
 
Introduction
The availability of appropriate information is one of the factors influencing the decision making process. The distribution of required information asymmetrically among individuals can produce different results. Therefore, although information can be important to the decision maker, however, we need to carefully assess the quality of information distribution (Diamond and Verechia, 1991). Hence, the information asymmetry leads to various adverse consequences such as increased transaction costs, market weakness, low liquidity, and, in general, a reduction in the profits from transactions in the capital market. These undesirable outcomes can be modulated by disclosing and clarifying the financial information to reduce the information asymmetry. With regard to the information disclosure process, investors (traders) face the problem of information asymmetry. This problem arises when one of the parties to the transaction has more information than the other party (Davani and Moini, 2007). The improper information issues result from information asymmetry and conflicting incentives for the investors and managers. This will bring about chaos to the capital market performance. Some of the measures taken to reduce these issues are as follows:

First, optimal contracts between companies and investors increase the incentive for managers to fully disclose information and leads to a reduction in the misleading evaluations.
Secondly, establishing the regulations to bind the managers to fully disclose information will reduce the problem of information asymmetry.
Thirdly, these unfavorable issues may be diminished through effective intermediary information such as the views of analysts and the institutions determining the credit rating of the companies (Izadinia and Soroush Yar, 2009).

Case study
The study statistical population included all the companies listed in Tehran Stock Exchange.

Materials & Methods

This research was an applied and correlational study. The research project was a quasi-experimental one, which was conducted by using a retrospective approach (through previous information). In this research, we used Tehran Stock Exchange databases, audited financial statements and Rahavard Novin software to collect data and information. Data analysis and testing the research hypotheses along with their results were done according to the outputs obtained from the Eviews software Ver. 9.
Discussion and Results
This research was aimed to answer the following question:

What is the effect the quality of information disclosed by companies on the information asymmetry in Tehran Stock Exchange Companies?

In this regard, six sub-hypotheses were developed by using the voluntary disclosure criterion and the quality rating of information disclosure to answer the research questions. The summary of the results is as follows:
The first sub-hypothesis of this study examined the relationship between the score of voluntary disclosure of information and the range of the proposed price difference for the purchase and sale of shares. According to the regression results, the significance of the coefficient related to the independent variable of information disclosure was 0.7877, suggesting a lack of significant relationship between these two variables. As a result, the first sub-hypothesis is not verified, which is consistent with the results of Khajavi and Alizadeh Talatapeh research (2014) and contradicts the results of Gao and Zhou (2015) study.
The second sub-hypothesis evaluated the relationship between the score of voluntary disclosure of information and the liquidity of the stock shares with the criterion of frequency of transactions. The coefficient of the independent variable of disclosure rating in this test was negative and significant (equal to 0.000). As a result, the second sub-hypothesis was accepted. It should be noted that the initial assumption about the relationship between the disclosure of information and liquidity of shares was the presence of a positive relationship between these two variables, while the test results proved the opposite. One of the possible reasons for this issue may be the inefficiency even at a weak level of the Tehran Stock Exchange. The studies conducted in relation to the efficiency of the Tehran Stock Exchange market confirm its ineffectiveness.
The third sub-hypothesis of the study was to investigate the relationship between the score of voluntary information disclosure and the earnings forecast error. Regarding the regression test and the significance of the coefficients, this hypothesis was not accepted and no significant relationship was found between the score of voluntary information disclosure and the earnings forecast error.
The fourth sub-hypothesis of this study examined the relationship between the score of voluntary information disclosure and the range of the proposed price difference for the purchase and sale of shares. Based on the results of regression, the significance of the coefficient of the independent variable of disclosure of information was equal to 0.003, suggesting the lack of significant relationship between these two variables. As a result, the fourth sub-hypothesis was not confirmed.
The fifth sub-hypothesis of the study was to investigate the relationship between the score of voluntary information disclosure and the stock liquidity. The independent variable coefficient of disclosure rank in this test was negative and significant (equal to 0.000). Accordingly, the fourth sub-hypothesis was accepted. This result was similar to that of the second sub-hypothesis.
Finally, the sixth sub-hypothesis of the research investigated the relationship between the score of voluntary information disclosure and the earnings forecast error. Due to the regression test and the significance of the coefficients, this hypothesis was not also accepted and no significant relationship was seen between the information disclosure rate and the earnings forecast error. Since no similar studies have been done on the relationship between disclosure quality and information asymmetry by the above computational approach, consequently, no comparison can be made with other studies.
Comparing the results of the two variables of voluntary disclosure score and the rating of information disclosure quality revealed that these two variables have had the same effects on the three dependent variables in this study. The effect of both variables on the stock liquidity is inverse and significant, while their effect on the earnings forecast error is positive and insignificant. The effect of these two variables on the difference range of the proposed price is positive but not significant. According to the obtained results, the information provided by the companies should be presented in a transparent manner so that the investors will be more willing to invest in the securities. Hence, the role of the Stock Exchange Organization becomes increasingly important in requiring the companies to provide transparent information. In addition, more serious laws should be established by the government to bind the companies for providing early and more accurate information. Along with regarding the financial statements and internal information of the companies, the investors should also pay further attention to the outsourcing information and consider such information in their analyses.

کلیدواژه‌ها [English]

  • voluntary disclosure
  • disclosure quality
  • Information asymmetry
  • Tehran Stock Exchange
1-Accounting Standards Developing Committee (2010); The theoretical concepts of Iran's financial reporting, Audit Organization Publishing. (In Persian)

2-Ahmadpour, A., & Rasaiian, A. (2006); The relationship between risk criteria and the price differences in the bid of buying and selling shares in Tehran Stock Exchange,  Journal of Accounting and Auditing, Tehran, No. 46, pp. 37-60. (In Persian)

3-Alkdai, H. K., & Hanefah, M. M. (2012). Board of directors’ characteristics and value relevance of accounting information in Malaysian shariah-compliant companies: a panel data analysis. Economics and Finance Review, 2(6), 31-44.

4-Bahri Salles, J., Bahnamoun, Y., & Hosseinzadeh, Gh. (2013); The board of directors' characteristics and the relevance of accounting information in companies listed in Tehran Stock Exchange, Journal of Accounting Knowledge and Management Audit, No. 63, pp. 6-51.[in Persian]

5-Davani, Gh. H., & Moini, M. R. (2007); The disclosure provisions of information asymmetry and its social consequences, DayaRayan Audit Institute.[in Persian]

6-Diamond, D. W., & Verrecchia, R. E. (1991). Disclosure, liquidity, and the cost of capital. The journal of Finance, 46(4), 1325-1359.

7-Gao, W., & Zhu, F. (2015). Information asymmetry and capital structure around the world. Pacific-Basin Finance Journal, 32, 131-159.

8-Ghanbari, M., Asadollahi, S. Y., & Taheri, F. (2016). Determining the Relationship between the Quality of Voluntary and Compulsory Disclosure and Information Asymmetry. International Journal of Academic Research in Business and Social Sciences, 6(1), 154-163.

9-Hajiha, Z., & Moradian, B. (2014); Examining the influence of information asymmetry and the value of the company on investing in Tehran Stock Exchange, Journal of Investment Knowledge, No. 3 (12), pp. 97-116. (In Persian)

10-Hanni, S. (2010). Effects of continuous and voluntary disclosures on information asymmetry-Evidence from the financial crisis.

11-Healy, P. M., & Palepu, K. G. (2001). Information asymmetry, corporate disclosure, and the capital markets: A review of the empirical disclosure literature. Journal of accounting and economics, 31(1-3), 405-440.

12-Hoque, H. (2014). Role of asymmetric information and moral hazard on IPO underpricing and lockup. Journal of International Financial Markets, Institutions and Money, 30, 81-105.

13-Izadinia, N., & Soroush Yar, A. (2009); An overview of voluntary disclosure literature; the role of auditors and financial analysts, Journal of Official Accountant, No. 6, pp. 46-51. (In Persian)

14-Khajavi, Sh., & Alizadeh Talatapeh, V. (2014); Investigating the effects of voluntary disclosure level on the information asymmetry of Companies listed in Tehran Stock Exchange, Quarterly Journal of Empirical Financial Accounting Studies, No. 42, pp. 89-115. (In Persian)

15-Khaleqi. N. (2010); The effect of conservatism on the frequency of profit forecasts by management of companies listed in Tehran Stock Exchange, Master's thesis, Isfahan University, 2010. (In Persian)

16-KhadamiPour, A., & Ghadiri, M. (2010); Investigating the relationship between accruals and information asymmetry in Tehran Stock Exchange, Journal of Accounting Progresses, Consecutive 59/3, pp. 1-29. (In Persian)

17-Kim, O., & Verrecchia, R. E. (1994). Market liquidity and volume around earnings announcements. Journal of accounting and economics, 17(1-2), 41-67.

18-Lang, M. H., & Lundholm, R. J. (1996). Corporate disclosure policy and analyst behavior. Accounting review, 467-492.

19-Li, K., & Zhao, X. (2008). Asymmetric information and dividend policy. Financial management, 37(4), 673-694.

20-Lin, T. J., Chen, Y. P., & Tsai, H. F. (2017). The relationship among information asymmetry, dividend policy and ownership structure. Finance Research Letters, 20, 1-12.

21-Liu, H., & Wang, Y. (2016). Market making with asymmetric information and inventory risk. Journal of Economic Theory, 163, 73-109.

22-Moussa, F., Delhoumi, E., & Ouda, O. B. (2017). Stock return and volatility reactions to information demand and supply. Research in International Business and Finance, 39, 54-67.

23-Nazemi, A., & Nasiri, T. (2014); Examining the relationship between disclosure of corporate information and corporate governance quality and institutional ownership, Financial Accounting Quarterly, No. 6 (24), pp. 99-120. (In Persian)

24-Norwani, N. M., Zam, Z. M., & Chek, I. T. (2011). Corporate Governance Failure And Its Impact On Financial Reporting Within Chosen Companies. International Journal of Business and Social Science, 2(21).

25-Paparizos, P., Dimitriou, D., Kenourgios, D., & Simos, T. (2016). On high frequency dynamics between information asymmetry and volatility for securities. The Journal of Economic Asymmetries, 13, 21-34.

26-Poikolainen, K. (1996). Sijoittajaviestintä, eli, Miten yritys varmistaa markkinoiden luottamuksen ja menestyy. Grey Eminence.

27-Setayesh, M. H., Kazemnejad, M., & Zolfaghari, M. (2011); Study the effect of disclosure quality on stock liquidity and cost of capital of the Companies listed in Tehran Stock Exchange, Journal of Financial Accounting Research, No. 1 (3), pp. 55-74.(In Persian)

28-Tourani-Rad, A., Gilbert, A., & Chen, J. (2016). Are foreign IPOs really foreign? Price efficiency and information asymmetry of Chinese foreign IPOs. Journal of Banking & Finance, 63, 95-106.