meaning of profitability “We are a trade specialist so all retail enquiries and enquiries from smaller independent installers are handled by our customers, which means they are sharing directly in the success of our campaign.” Dave Rosenberg, chief economist at Gluskin Sheff, said there was no real breakthrough in the bond market, and that current interest rate yields did not significantly break the mean and median levels since 2009. Interest determines the regularity of prescriptive (interest this qualitative rules will determine the amount of the rules), the amount of interest depends on profit, interest rate depends on the average profit margin. Marx further pointed out that, between average profit margin and zero, interest rate depends on two factors: one is profit margin; The second is the proportion of total profits allocated between lenders and borrowers. The fund said last year that it would grow 1.1% in 2017 and then increase its forecast to 2%. Market is the inevitable product of the division of labor and the development of commodity economy. At the same time, the market also promotes the social division of labor and the further development of commodity economy during its development and expansion. The market through information feedback directly affects the production of people, how much production, and the market time, product sales status, etc.; Middle link commodity economy development process, supply and sale, the parties to provide production, supply and sale parties exchange places and other exchange, exchange time, to realize the commodity producers, operators and consumers their own economic interests.