1
Assistant Prof., Department of Financial Management and Financial Engineering, Faculty of Finance Sciences, Kharazmi University, Tehran, Iran.
2
MSc., Department of Financial Management, Faculty of Finance Sciences, Kharazmi University, Tehran, Iran
10.30495/jik.2025.23530
Abstract
The existence and integration of private information in the financial market will create noise and induce investors to trade in order to attain profits. Another important parameter in capital market is the investors sentiment, which can play an effective role in stock price trends and market transactions. Unprecedented growth of the stock market index and the entry of many Individual investors who do not have enough information that they sometimes trade under the influence of sentiment, the study of this issue has made more important. To this end, in this research we investigate the relationship between investor sentiment and informed trading in Tehran Stock Exchange, by using the statistical data of 167 firms listed in Tehran Stock Exchange from 15 various industries during ten years from March 2010 to March 2020. We use the Baker-Wurgler sentiment index as our primary measure of investor sentiment that Measured by principal component analysis. Also, we use the private-information-based trading measure advocated by Llorente. The results show that the positive investors sentiment have no significant effect, but negative sentiment have a significant negative effect on private-information-based trading. As in periods with negative sentiment, we see a decrease in private information trading and an increase in the amount of uninformed trading in the next period.
ساداتی، اکرم سادات؛ آقابابایی، محمد ابراهیم. (1397). بررسی رفتار تودهای مبتنی بر واریانس موزون مقطعی در بورس اوراق بهادار تهران. مهندسی مالی و مدیریت اوراق بهادار، 9(35)، 219-137.
سعیدی، علی؛ مشایخی، مرجان. (1390). اندازه هلال ماه و بازده بازار در بورس اوراق بهادار تهران. بورس اوراق بهادار، 4(14), 81-98.
عسگری، مهدی؛ حاجی حسن معمار، احسان؛ متین مطلق، مریم. (1394). بررسی تاثیر گرایشات احساسی سرمایه گذاران بر جریان نقد آزاد، اقلام تعهدی اختیاری و بازده سهام در شرکتهای پذیرفته شده در بورس اوراق بهادار تهران در سالهای 1392-1388. دومین کنفرانس بین المللی پژوهشهای نوین در مدیریت، اقتصاد و حسابداری.
عیوضلو، رضا؛ راعی، رضا؛ محمدی، شاپور. (1391). اثرات تقویمی در احتمال معاملات مبتنی بر اطلاعات نهانی. فصلنامه بورس اوراق بهادار، 5(18)، 5.
فلاح شمس، میرفیض؛ حقشناس کاشانی، فریده؛ افشار هاجر، فیروزه. (1391). بررسی تأثیر کانون کنترل بر خطاهای ادراکی در تصمیمگیری سرمایهگذاران در بورس اوراق بهادار تهران. دانش سرمایهگذاری، 1(3)، 105-124.
کامیابی، یحیی؛ جوادی نیا، امیر. (1400). بررسی اثر تعدیلکننده توانایی مدیریت بر رابطه بین احساسات سرمایهگذاران و محافظهکاری حسابداری. بررسیهای حسابداری و حسابرسی، 28(1)، 102-134.
موسوی، سیدمرتضی؛ آقابابائی، محمد ابراهیم. (1396). تاثیر اطمینان بیش از حد بر رفتار سرمایهگذاران: شواهدی از بورس اوراق بهادار تهران. دانش مالی تحلیل اوراق بهادار، 10(34)، 25-37.
مومنی،منصور؛قیومی،علی (1387).تحلیلآماریبااستفاده از SPSS. چاپ دوم.تهران:انتشارات کتابنو.
Baker, M., & Wurgler, J. (2006). Investor sentiment and the cross-section of stock returns. Journal of Finance, 61: 1645-1680.
Baker, M., & Wurgler, J. (2007). Investor sentiment in the stock market. Journal of economic perspectives, 21(2), 129-152.
Borisova, G., & Yadav, P. K. (2015). Government ownership, informed trading, and private information. Journal of Corporate Finance, 33, 196-
Cai, Y., & Lau, S. T. (2015). Informed trading around earnings and mutual fund alphas. Journal of Banking & Finance, 60, 168-180.
Cheema, M. A., Man, Y., & Szulczyk, K. R. (2020). Does investor sentiment predict the near‐term returns of the Chinese stock market?. International Review of Finance, 20(1), 225-233.
Chue, T. K., Gul, F. A., & Mian, G. M. (2019). Aggregate investor sentiment and stock return synchronicity. Journal of Banking & Finance, 108, 105628.
Fishman, M. J., & Hagerty, K. M. (1995). The mandatory disclosure of trades and market liquidity. The Review of financial studies, 8(3), 637-676.
Firth, M., Wong, K. P., & Wong, S. M. L. (2015). Corporate transparency and the impact of investor sentiment on stock prices. Management Science, 61 (7), 1630-1647.
Lenkey, S. L. (2021). Informed Trading with a Short-Sale Prohibition. Management Science, 67(3), 1803-1824.
Llorente, G., Michaely, R., Saar, G., & Wang, J. (2002). Dynamic volume-return relation of individual stocks. The Review of financial studies, 15(4), 1005-1047.
Li, J. (2019). Sentiment trading, informed trading and dynamic asset pricing. The North American Journal of Economics and Finance, 47, 210-222.
Li, L., & Galvani, V. (2021). Informed Trading and Momentum in the Corporate Bond Market. Review of Finance, rfab004, https://doi.org/10.1093/rof/ rfab004
Lye, C. T., Khong, J. S., & Hooy, C. W. (2019). Board Gender Diversity, Investor Protection, and Private Information-Based Trading. Global Economic Review, 48(4), 419-439.
Karavias, Y., Spilioti, S., & Tzavalis, E. (2016). A comparison of investors sentiment and risk premium effects on valuing shares. Finance Research Letters, 17, 1-6.
Pan, W. F. (2020). Does Investor Sentiment Drive Stock Market Bubbles? Beware of Excessive Optimism!. Journal of Behavioral Finance, 21(1), 27-41.
Pedraza, A. (2020). Informed trading in business groups. The World Bank Economic Review, 34(2), 351-370.
Phan, T. N. T., Bertrand, P., Phan, H. H., & Vo, X. V. (2021). Investor Sentiment and Stock Return: Evidence from Vietnam Stock Market. The Quarterly Review of Economics and Finance.
Aghababaei,M. E. and madani,S. (2025). Investor sentiment and prevalence of informed trading in Tehran Stock Exchange. Journal of Investment Knowledge, 14(54), 19-38. doi: 10.30495/jik.2025.23530
MLA
Aghababaei,M. E. , and madani,S. . "Investor sentiment and prevalence of informed trading in Tehran Stock Exchange", Journal of Investment Knowledge, 14, 54, 2025, 19-38. doi: 10.30495/jik.2025.23530
HARVARD
Aghababaei M. E., madani S. (2025). 'Investor sentiment and prevalence of informed trading in Tehran Stock Exchange', Journal of Investment Knowledge, 14(54), pp. 19-38. doi: 10.30495/jik.2025.23530
CHICAGO
M. E. Aghababaei and S. madani, "Investor sentiment and prevalence of informed trading in Tehran Stock Exchange," Journal of Investment Knowledge, 14 54 (2025): 19-38, doi: 10.30495/jik.2025.23530
VANCOUVER
Aghababaei M. E., madani S. Investor sentiment and prevalence of informed trading in Tehran Stock Exchange. Journal of Investment Knowledge, 2025; 14(54): 19-38. doi: 10.30495/jik.2025.23530