Only when the firm possesses certain heterogeneous core knowledge and competence can it obtain monopoly position in the factor markets and gain superprofit that exceeds the average profit.
Manage the key competitive power in the meaning, mean enterprises take shape in the course of management, difficult to what the rival imitates, and can bring the ability of the super-profit.
It should not exist in an efficient market that investor can win super-profit through using the technological analytic approach to analyze historical message of the stock price.