The Impact of the Announcement of the Vaccine's Success on the Company's Stock

This article examines the impact of Pfizer's announcement of the vaccine's success within the framework of the ongoing COVID-19 situation. By constructing ARIMA model, this paper compares Pfizer's stock price change after the vaccine announcement with the forecast unannounced stock price change, so as to judge the impact on the company. This paper found that the company's stock price rose significantly, proving that the company can promote the development of vaccine research and development by announcing a positive image. This paper covers the economic and public health areas to study the impact of the company, and the use of time series to predict. Through the research conclusion, this paper suggests that investors may prefer to choose a more positive image and impact of the enterprise investment, in order to protect returns. At the same time, leaders can also lead the enterprise to create a positive image, to bring more support and opportunities.