Bonds or treasury bills are one of the internal borrowing means it was first released in (1947) and issued by the law of the legislature. The reason of their issuance by law is being a financial burden on state represented in the payment of loan principal and its interests at time of its maturing and to the traditional relevance which is connected to the tax as a deferred tax to which the state resorts in order to obtain the necessary funds to repay the loan. Its issuance would be according to direct and indirect subscriptions method and selling in the stock market (stock exchange) and sell by bidding. Accordingly the reason behind issuing such bonds lies at reducing inflation in terms of holding part of the cash loan at individuals and institutions , strengthening and maintaining the economic, political and military capacity of the state, etc; and the consequent multiple economic effects on economic development including the rivalry of financial investment to productive investment in kind ,thus the negative impact on the volume of real investment and converting the central bank of Iraq into a financing project institution which replaces the investment budget. Then canceling the monetary authority and its functions in the case of expansion in accepting more treasury remittances and replace them with mandatory reserve in order to finance projects of different ministries. So the target of the research is to study the theoretical framework of treasury bonds, and the reason for their issuance and its effects on the economic development