Generally speaking, the market is a concept of trading mechanism, and any trading mechanism related to goods and services can form a market. The market can be either a tangible market with a specific place or an intangible market, especially in general. Therefore, we can define financial market as the summary of financial transaction mechanism, that is, the sum of places and behaviors for financing through financial instrument transactions.

Financial market is an important part of the market system. It has both the characteristics of the market system and its own characteristics, which establishes the special position of the financial market in the market system. A comprehensive and systematic investigation of financial markets is the basis for the development and utilization of financial markets.