Securities investment refers to investors (as a legal person or natural person) to buy shares, bonds, funds, securities, and securities derivatives, in order to get dividends, interest, and capital gains investment behavior and investment process, is an important form of indirect investment. [1] Market is generally believed that tax reform important progress and good economic data pushed up investor optimism about the U.S. economy growth, coupled with a near record levels of long positions covering, some traders selling positions betting on further flattening of the yield curve, lead to long-term Treasury yields climbed sharply this week. The new architecture also means the pages on the content rich site now load in milliseconds, ensuring that potential customers visiting the site are engaged for long enough to register their interest. Then the interest rate theory of the loan is the interest rate theory of neoclassical school, which is proposed to correct Keynes's theory of "liquidity preference". In some ways, the theory of interest rate can be regarded as a synthesis of classical interest rate theory and Keynesian theory.