what is a trading profit and loss account Mooney and si prowse in its around the main accounting principles for enterprises ", not only emphasize to determine profits in a timely manner, and emphasizes the necessary through division operating earnings, the gains and the impact of price changes, to improve the comparability of financial statements and understandability. This may have a negative effect on the sales of Xpoint products. In general, us interest rates fall and the dollar weakens. Us interest rates rise and dollar trends favour. A change in the price of U.S. Treasury bills, especially long-term Treasury bills, can help to predict the direction of the U.S. dollar. If investors think the us inflation is under the control, then under the existing Treasury bonds interest rate to attract, especially short-term Treasury bills, will attract investors, bond prices to rise. Economist lynde hull explained that the benefits of capital in different periods of time would be interest. According to linde hull, interest in a specific period and the difference between the expected consumption is savings (during the period of the growth of capital), and returns the sum of consumption and savings are given period of time. In 2017, the blockchain enters the public eye through bifurcation, CryptoKitties and ICO. Driven by investment opportunities and media attention, traditional businesses and consumers have begun to focus on the cryptocurrency and its underlying blockchain technology. Enterprise due to withdraw, and transfer or liquidation disposal of equity investment and equity investment losses, can be in pre-tax deduction, but the deduction of each tax year equity investment losses, shall not exceed the implementation of equity investment income and transfer income, more than part can be to a tax year after deduction carry forward indefinitely.