According to the travelling expenses data, in mid-december in zhejiang market price of R22 / everything/R410a 1.53/2.57/36500 yuan/ton, respectively, from early September at the bottom of the periodic rebounded 20% / 38% / 46% respectively, the downstream demand off-season, but the price of raw material hydrofluoric acid, chloride methane due to higher environmental factors superposition enterprise starts ascending space limited (according to the travelling expenses, effective device industry starts. Seventy percent), refrigerant price off-season does not light. Moreover, the average price of r22/r22/r134a/R410a has increased by 68%/32%/103%, respectively, from 2016Q4. Compared with the raw material spread, we have been able to calculate the company's overall profitability. 304/5000 Most western interest-rate determinism focuses on the analysis of supply and demand comparisons, arguing that interest rates are a price. The difference lies in what supply and demand determines interest rates. For example, Marshall's real interest rate theory emphasizes the real factors of non-monetary factors - productivity and the role of economy in determining interest rate decisions. Productivity is expressed by marginal propensity to invest, and the marginal propensity to save is expressed. There is no risk of this arbitrage. Range and once the two currencies yield, the yield of arbitrage mechanism will make two currencies are equal, that is, different interest rates in the currency of the country there is inherently a trend towards an equalization and trend, it is the interest rate index key aspects of the impact of foreign exchange to, also is our interpretation and grasp the key interest rate index.