profit equity Medium small Springall said: "this will be a long time before fully recover energy saving market also so if savers, waiting for a long time, they may eventually in some we saw in more than a year the most preferential price missed." Compression ratio The difference between the income and the total income has been realized The principle of rational investment: investment in securities investment in analysis and comparison. The market can indeed be described as a laissez-faire pricing mechanism. However, this price mechanism does not operate in a vacuum, and does not work effectively in any social system. The basic premise of the efficient operation of the price mechanism is the implicit assumption of Smith: to recognize individual "lusts" and to clear and protect individual property rights. Clear and guaranteed personal property is the basic premise of market existence. It is necessary to recognize the personal "lusts" and to ensure that individual property rights are supported by the corresponding institutions, which are not in our society.