The research was formed with the aim of knowing the relationship between the dividend policy and the dividend speed. This study examines the effect of the factors of investment ratio and dividend payment ratio on the dividend speed and it is done by relying on the financial information of the companies listed to the Tehran Stock Exchange. This research is descriptive, analytical and correlational in terms of its nature and method, which is an applied research in terms of its purpose. In this research, using a quantitative method to analyze the financial information collected from the companies listed to the Tehran stock exchange and the test of research hypotheses was discussed. The statistical sample consists of 112 companies between 2016 to 220, which investigated the research hypotheses by using the regression model and benefiting from Eviews 10, and in this way, the type of relationship and significance of the research variables was determined. The results and findings of the research indicate the existence of a positive and significant relationship between the investment ratio and the rate of dividend adjustment in the statistical sample and the absence of a relationship between the dividend payment ratio and the rate of dividend adjustment among the companies listed to the Tehran Stock Exchange. This issue shows that with a change in the investment approach of Iranian companies, their desire to provide domestic financial resources from the place of dividend will probably increase, and as a result, the level of dividend adjustment speed will also increase or decrease
