Probability Analysis of China's Stock Market Rise and Fall Based on Data Mining Algorithm

The stock market is called the economic barometer of a country. The stock price index can describe the general change of the price level in the stock market. It is a price average and can indicate the change of the stock market. In recent years, with the rapid development of China's economy, the research on stock index has become a hot topic. Based on technical analysis, this paper uses data mining algorithm and Poisson distribution to fit the dynamic process of stock index return rate, constructs a probability inference model, and predicts the rise and fall probability of stock index.