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According to the research report of financial institutions, the trading volume of derivative financial commodity market usually drops sharply during the period of stock market downturn. This is because investors' income expectations of derivative financial products have decreased, while risk aversion has increased. For example, during the global financial crisis in 2008, the stock market plummeted, and the markets of derivatives such as futures and options also fell into chaos. Many investors suffered heavy losses because of the transactions of derivatives.Under the unified leadership of the CPC Central Committee and the State Council, the stock market has always been regarded as a barometer of a country or region's macro-economy. When the macro-economy improves, the profit expectation of enterprises increases, and the stock price often rises. For example, during the economic boom, the sales of products of technology giants like Apple increased greatly, profits continued to rise, and stock prices also rose. The price trends of many stocks can reflect the vitality and development trend of the overall economy. According to statistics, in the past economic cycle, there was a positive correlation between the stock market index and GDP growth of about 70%. This means that the rise of the stock market is often accompanied by macroeconomic growth, and the failure of the stock market may imply that there are potential problems in the economy.Second, the dependence of derivative financial products on the stock market

2. The function of capital accumulation and resource allocation in the stock market.The stock market also has the function of resource allocation. The rising stock market can guide the flow of funds to enterprises with good efficiency and development potential, and realize the optimal allocation of resources. When the stock price does not rise, the flow of funds may be stagnant or disorderly, and those high-quality enterprises that should have been supported by funds may be ignored, resulting in waste of resources and inefficient allocation.Derivative financial products, such as futures, option icon, funds, insurance, etc., are financial products derived from basic assets such as stocks and bonds. Their value is derived from the price changes of the underlying assets. For example, stock option is a derivative product based on stock, and its value depends on the price fluctuation, maturity time, volatility and other factors of the underlying stock. If the stock market does not rise and the stock price lacks fluctuation, then the value of stock options will be difficult to be reflected. Moreover, derivative financial products themselves have high risks, and their price changes are often more violent than the basic assets. When the stock market does not rise, the high-risk characteristics of derivative financial products will be amplified, and investors may suffer huge losses.

The existence and development of derivative financial commodity market is based on the stock market. The stock market provides the pricing basis and trading objects for derivative financial products. If the stock market does not rise, derivative financial products will lose the source of their price changes. For example, stock index futures are futures contracts with the stock index as the target. If the stock index does not rise for a long time, it will be difficult to attract investors and its market value will be greatly reduced.Derivative financial products, such as futures, option icon, funds, insurance, etc., are financial products derived from basic assets such as stocks and bonds. Their value is derived from the price changes of the underlying assets. For example, stock option is a derivative product based on stock, and its value depends on the price fluctuation, maturity time, volatility and other factors of the underlying stock. If the stock market does not rise and the stock price lacks fluctuation, then the value of stock options will be difficult to be reflected. Moreover, derivative financial products themselves have high risks, and their price changes are often more violent than the basic assets. When the stock market does not rise, the high-risk characteristics of derivative financial products will be amplified, and investors may suffer huge losses.2. The relationship between the market base of derivative financial products and the stock market.