Is the subject of the financial structure of the most important topics for which she received the interests of scientific research in the field of financial management , as it emerged several theories about choosing a financial structure appropriate for the facility and behavior change funding them , and in spite of that there is no agreement on a specific theory answer various questions in this regard , and a special issue of the financial structure optimization.

The objective of the research was to identify the most important theories of the structure of modern financial theory has been to focus on the capture of financial firms in two different stages of their life cycle , so-called growth and maturity.

As demonstrated research variables in one variable independently , which represents the rate of sales growth as it turns variable adopted in the rate of growth in retained earnings , while the research community has been represented by (23) U.S. companies large and diverse activities listed in the fortune 500, has been using some statistical methods The task of calculating t) tabular (f t) calculated ( to see the strength of the association between the two variables and were used as well as (f spreadsheet ( and f) the calculated ( to see the degree of influence between the two variables .

The research has come to several conclusions was the most prominent of the existence of a variety of factors and hidden phenomenon that will affect the behavior followed by funding companies through the stages of their life cycle is the most important of these factors retained earnings . The most important recommendations that came out of the current research is to encourage companies to pay attention to the life cycle of established financial terms and define the behavior of financial companies followed at every stage