رابطه ضریب واکنش سود با اندازه شرکت و سود غیرمنتظره در شرکت‌های پذیرفته‌شده در بورس اوراق بهادار تهران

نوع مقاله : علمی - پژوهشی

نویسنده

* استادیار، دانشگاه خوارزمی.

چکیده

     امروزه اطلاعات، مهمترین بخش از فرایند سرمایه­گذاری است. اطلاعات موجب اخذ تصمیمات متفاوت در افراد مختلف می­شود. عدم آگاهی سرمایه­گذاران از عوامل مؤثر بر واکنش سایر سرمایه­گذاران می­تواند منجر به واکنش بیش از حد یا کمتر شود که در نهایت سرمایه­گذاران زیان خواهند دید. این تحقیق به­بررسی رابطه سود غیرمنتظره و اندازه شرکت بر ضریب واکنش سود در شرکت­های پذیرفته‌شده در بورس اوراق بهادار تهران پرداخته است که برای اندازه­گیری ضریب واکنش سود از بازدهی غیرعادی انباشته، اندازه شرکت از میزان فروش شرکت، سود غیرمنتظره از اختلاف سود واقعی از سود پیش­بینی­شده و برای محاسبه بازده مورد انتظار از مدل اصلی فاما و فرنچ استفاده شده است. برای این منظور، اطلاعات مربوط به 135 شرکت نمونه در صنایع مختلف بورس در دوره زمانی 9 ساله (بین سال­های 1385-1393)، مورد تجزیه­وتحلیل قرار گرفته (در مجموع 1215 شرکت- سال) تا ارتباط بین متغیرها برای آزمون فرضیه تحقیق بررسی شود. نتایج تحقیق نشان می­دهد که سود غیرمنتظره رابطه مستقیم و معناداری بر ضریب واکنش سود شرکت­های مورد بررسی دارد و نیز اندازه شرکت رابطه منفی و معناداری بر ضریب واکنش سود شرکت­های مورد بررسی داشته است. 

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