non profit fundraiser ideas 2. Equality of shares, that is, each share of the same kind shall have equal rights; A broad market is a group of vendors and individuals who are associated with other vendors and individuals to buy and sell certain goods. The size of the market, the size of the market, is the number of buyers. Under the theoretical framework of the theory, the theory of commodity market equilibrium and the monetary market equilibrium of Keynesian theory are unified. Marx's theory of interest rate decisions from the perspective of the source and essence of interest, taking into account the institutional factors in the role of interest rate decisions of interest theory, its theoretical core is the interest rate is determined by the average profit margin. Marx believed that under capitalism, interest is a part of profit and a form of conversion of surplus value.