بررسی رابطه میان انحراف سود تحقق یافته از سود پیش بینی شدۀ سهام با بازده قیمت سهام در بورس اوراق بهادار تهران

نویسندگان
ابوالفضل صادقی باطانی 1
علی سوری 2
ابراهیم التجائی 1
1 پژوهشگاه علوم انسانی و مطالعات فرهنگی
2 دانشگاه تهران
10.18869/acadpub.jemr.7.26.111
چکیده
هدف اصلی در این مطالعه بررسی اثر انحراف سودهای پیش بینی از سودهای تحقق یافته بر بازدهی قیمت‌های سهام در بورس اوراق بهادار ایران است. در واقع این موضوع اثر انحراف سودهای پیش بینی که ناشی از انحراف در پیش بینی توسط مدیران شرکت ها است، بر بازدهی قیمت های سهام مورد بررسی قرار می‌دهد. برای نیل به این هدف، 194 شرکت پذیرفته شده در بورس اوراق بهادار تهران، در بازه زمانی 84-1392 انتخاب شده است. در این مطالعه، دو گروه از شرکت هایی که بازدهی بالا و شرکت هایی که بازدهی پایینی را در دوره مذکور تجربه کردند انتخاب شد و از مدل چند عاملی فاما و فرنچ (1993) به عنوان مبنای نظری استفاده شد. نتایج با توجه به روش حداقل مربعات تعمیم یافته (GLS)، حاکی از آن است که آن دسته از شرکت های با بازدهی بالا در مقایسه با شرکتهایی که بازدهی پایینی را در طی سال‌های قبل تجربه نمودند، انحراف سود کمتری دارند و مدیران این شرکتها در پیش بینی های خود محتاطانه‌ تر عمل می‌کنند و نسبتاً پیش بینی دقیق‌تری از سود های آتی ارائه می‌کنند. در عین حال شرکتهایی که عملکرد خوبی را در گذشته تجربه نکرده اند، در ابتدای دوره پیش بینی بالاتری را برآورد می‌کنند، ولی در انتهای دوره با تعدیل های منفی، پیش بینی خود را اصلاح می‌کنند. از دیگر نتایج اینکه تغییرات سود محقق شده در هر سال با بازدهی سهام، رابطه مثبت و معنی دار دارد، اما تغییرات سود پیش بینی از سود محقق شده سال قبل با بازدهی سهام رابطه منفی دارد. رابطه بین بازدهی شاخص کل و بازدهی سهام، مثبت و معنی دار است که برای گروه شرکتهایی با بازدهی بالا در مقایسه با شرکتهای با بازدهی پایین اثر قوی تری را نشان می‌دهد.
کلیدواژه‌ها
بازده سهام
بازده شاخص کل بازار
سود پیش بینی شده
سود محقق شده
مدل قیمت گذاری دارایی های سرمایه ای

عنوان مقاله English

The Investigation of Relationship between Diversion Earnings Forecasts From Earnings Realized and Returns Stocks in Tehran Stock Exchange

نویسندگان English

abolfazl sadeghi batani 1
ali souri 2
ebrahim eltejaei 1
1 Institute for humanities and cultural studies
2 univercity of tehran
چکیده English

The main purpose of this study, is to evaluate the effect of diversion earnings forecast and earnings realized on returns stocks in Tehran Stock Exchange. In fact, this research aims to examine the diversion of earnings resulting from the diversion of corporates managers forecasts earnings, what impact these diversion of earnings have on the returns of stock price. To achieve this, 194 companies listed in the Tehran Stock Exchange selected in the period of 2005-2013.

In this study, two groups of companies experienced the highest returns and lowest returns over the period studied, have been selected. Multi-factor model of Fama and French (1993) was used as the theoretical basis. The results indicate that forecasts of companies have experienced highest returns in comparison with lowest returns are more cautious and accurate than prediction of their future earnings. Changes in earnings realized and Tehran Stock Exchange index returns have positive and considerable relationship with stock returns as well, but these relationships for companies with highest returns are stronger than companies with lowest returns.

کلیدواژه‌ها English

Returns Stocks
Tehran Stock Exchange Index Returns
Earnings Forecasts
Earnings Realized
Capital Asset Pricing Model (CAPM)
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