Based on the consideration of both the individual risk of enterprises and the common risk of enterprises being affected by the macroeconomic situation of the whole country, this paper uses a new idea to determine the weights and proposes a model for calculating the VaR of individual stocks using weighted distribution. The stock returns of four companies listed on the Shenzhen Stock Exchange are used for empirical analysis and model testing. The results show that the weighted distribution improves the accuracy of calculating VaR under the original assumption that the return distribution obeys a single distribution. Especially for enterprises with strong individual risks, the weighted distribution model is a simple and more accurate model. [Keywords]: VaR Weighted distribution market model In the past 20 years, with the trend of economic globalization and investment liberalization, the volatility of financial markets has become increasingly severe, and financial risk management has become the core content of financial institutions and corporate management. For each of the thousands of different companies in the financial market, each company has its own characteristics, which may come from the industry to which the company belongs or the internal operation of the company or some other unexpected events. For listed companies, this information will be reflected in the fluctuation of stock prices. On the other hand, the returns of corporate stocks traded in the financial market are correlated with the average returns of the entire financial market. For example, when the entire market is prosperous, the average return of the financial market (usually represented by a certain market index) is high, and when other conditions are the same, individual stocks in the market are likely to have higher returns. On the contrary, if the economic situation is very bad, the average return in the market will be very low or even negative. When other conditions are the same, individual stocks are also likely to have low returns (many models try to capture this relationship between the entire financial market and the various individual securities traded in the market. The market model and the CAPM model are classic models in this regard). Shareholders\' risks are reflected in the fluctuations of stock prices. To predict the market risk of a listed company in the future, we should consider both the individual risks of the enterprise and the common risks that the enterprise will be affected by the overall national macroeconomic situation. This paper proposes a model for calculating the VaR of individual stocks based on the above factors. That is, the weighted distribution model is used to calculate the VaR of individual stocks.
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