An event study approach to investigating the effects of returns declaration on stock prices in Chinese market

Abstract

The main goal of this research is to examine how returns declaration posted by companies in A shares and B shares market affect companies’ stock prices. Event study was used to investigated the impact of returns declaration on companies’ stock prices. As for the type of data needed for the research, in order to conduct event study, I collected companies’ stock prices and their corresponding date in a time series format. Particularly, the year I selected for investigating companies’ annual returns declaration is 2018. By going through the reports from tonghuashun.com, a financial data service website in China, I successfully identify 16 leading companies in both A shares stock market and B shares stock market, with regard to companies related field. From the result we find out that the average cumulative abnormal returns in both A shares and B shares market are negative within the event window. What’s more, there exists significant value of abnormal returns both before and after the event date for returns announcement.