what is accounting profit The determination of this ratio mainly depends on the supply and demand relationship between the two sides and the competition. In general, the interest rate falls when the supply exceeds demand. Interest rates rise when demand exceeds supply. In addition, law, habit and so on also have a larger role. Marx's theory is of guiding significance to explain the question of interest rate decision under socialized production. Financial staff are used to dividing the investment payback period into long-term, intermediate and short-term periods. The term usually refers to more than five years, short term generally refers to a period of less than one year, and the middle term is somewhere in between. Managers also use long, medium and short term to describe the plan. Long-term plan describes the organization in a quite long period (usually more than 5 years) and the development direction of policy, regulation on the group's various departments over a longer period of time in some activities should reach the goal and requirements, mapped the organization long-term development blueprint. Short-term plans specifically provides for all departments of an organization in the current stage, to the future the shorter period especially in the recent period of time, which should be engaged in activities, engaged in such activities should meet the requirement, and thus provides a basis for the ACTS of all members of the organization. The differences between the two countries are significant because the basic national conditions and economic system of the two countries are fundamentally different. Planned economy and planned economy into market economy, the stage because the traditional pattern of economic and financial structure, imperative the mandatory administrative regulations directly effective, fast, accurate, coupled with the central bank's marketization operation ability is limited, the lack of experience, the benchmark interest rate to today still become society's widespread interest rate decision criteria. The fed is highly marketable, with each "federal funds rate" adjusting to market results after open market operations.