Investigating the Relationship between Product Market Competition and Information Content in Quarterly Earnings Announcement

This study examines the relationship between information content in quarterly earnings announcement of Tehran Stock Exchange with firm’s product market competition in the presence of factors such as firm size, leverage and future growth opportunity in different industries. For this purpose, data of Stock Exchange for the period 1387-1391 were gathered. We used regression for examining synthetic data. Results show that quarterly earnings announcement and information content have a positive relation with product market competition. Examination of other variables also showed that these variables have no relationship with information content in quarterly earnings announcement.