There are several classic theories in the stock market.

The so-called stock investment theory refers to the sum total of the epistemology and methodology system from the perspective of effectively avoiding risks and maximizing returns in the stock market, taking the stock price formation mechanism and the operation law of the stock market as the research content, taking the fluctuation direction and space of the stock market as the research object, the research methods and means of various disciplines, and taking investment opportunities and risk assessment as the research framework.

Representative stock investment theories include: random walk theory, modern modern portfolio theory, efficient market hypothesis, behavioral finance, evolutionary securities and so on.

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