Diversification of securities, the establishment of a scientific and effective portfolio of securities; Famous British economist hicks and others argue that the above theory did not consider the factor of income, and therefore unable to determine the level of interest rates, in 1937, and puts forward the is-lm model on the basis of general equilibrium theory. It establishes a theory of interest rates and income at the same time that the four factors of savings and investment, money supply and monetary demand interact. [R esponding to suggest continued low interest rates and bond purchases at the limiting the central bank's room for manoeuvre in the case of an economic downturn, draghi said the drop was a "the possibility of more distant than it was a year ago". Palmer said: "I'm worried about the British retailers are now in the midst of a perfect storm, interest rate decisions in November, rising inflation, real wages, falling credit availability and the UK to take off the European uncertainty increased, these during the Christmas season for caused an unprecedented pressure on household budgets, pushed consumer confidence to historic lows. "Historically, the concept of income has first appeared in economics. Adam Smith, in the wealth of nations, defined income as "the amount of consumption that is not eroded by capital", and saw it as an increase in wealth. Later, most economists inherited and developed this view. 1890, ai (Alfred Marshall Maarshell) in its "the principles of economics," the Adam Smith's "wealth increase" enterprise, introduced the concept of earnings, is proposed to distinguish the entity capital and value-added benefits of economic benefits. According to the local biggest news agency Press Trust of India news agency (Press Trust of India) reported that, according to official sources in nine exchange about 2 million registered users, about 400000 to 500000 people have been conducting currency trade and investment. 2. Predictability. The plan is made before the action, which aims to achieve the goals of the future, and to accomplish the next tasks and tasks. Ms Stephens continues: “The new extension has provided a fantastic and really flexible space that thanks to the new PURe® patio doors and windows, can be enjoyed whatever the weather. It’s great to be able to open up the living space and enjoy the close access we now have to the garden but even when the blustery weather that we are so familiar with here in the Yorkshire Dales takes hold, the glazing has provided us with a peaceful and cosy retreat. It’s the perfect space for both work and relaxation and I couldn’t be happier!”