Historical costs differ from current values Moment of torque Security is very important, reduce risk is big potential! Among them, the repeal of the affordable care act means obamacare will be repealed, and the tax reform bill has essentially repealed obamacare. The media is expected to sign a tax reform bill on January 3 that would make it a bill. 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.