The international monetary fund welcomes the progress of Brexit, but warns that the timetable is ambitious - corporate life Marx's interest rate determinism is based on the source and essence of interest. Marx reveals that interest is a portion of the surplus that the capitalist who lends capital is divided from the capitalist who borrows the capital, and the profit is the transformation form of the surplus value. A CBI survey of 109 companies this month found that online sales of black Friday and cyber Monday were "unremarkable". The independent of interest is of positive significance to show the active role of the fund users in the reproduction process.