The Analysis of the Abnormal Return Rate of Platform Enterprises

It is a definite trend that AI technology has become a new important factor of production. This study will be mainly through the event research method, the use of Shanghai, Shenzhen and Hong Kong listed companies panel data, combined with the relevant platform enterprise financial performance data, establish a mathematical model, study the latest introduction of the new technology of artificial intelligence (LLM, etc.) on the company stock yield, according to different enterprises set up multiple events window, fitting for stock abnormal yield, and use fundamental analysis and other financial means to estimate the future stock yield trend. As is revealed in the mathematical model, the capital market responses positively to the introduction of the artificial intelligence technology. Moreover, the informational announcements have a high degree of impact on regardless of number. The result suggests platform enterprises. The results encourage enterprises to introduce artificial intelligence technology and government to set up regulations accelerating development and productive practice. It has clarified the impact of the application of cutting-edge hot technologies such as new artificial intelligence technologies and large models that attract global attention on abnormal stock returns, which provides a reference basis for the national government to introduce relevant policies to encourage, support and guide the digital transformation of China's listed enterprises and promote the healthy development of artificial intelligence.