The relevance of Environmental, Social, and Governance (ESG) performance in corporate valuation has been growing, in tandem with investors' increasing focus on sustainability and non-financial risks. As a leading enterprise in China's new energy vehicle industry, BYD plays a pivotal role in the A-share market, making it a suitable case study for examining how ESG-related information is priced by the capital market. This study adopts a case firm approach, focusing on BYD, to investigate the quantitative impact of ESG factors on firm valuation. To this end, an event-based analytical framework implemented in R is utilised. ESG-related disclosure events are identified based on publicly available announcements from the CNINFO platform and third-party ESG rating updates. The present study employs an event study approach to examine market reactions around these events by calculating abnormal returns and cumulative abnormal returns within specified event windows. The empirical evidence indicates that the stock market demonstrates discernible valuation responses in the vicinity of ESG-related disclosure events, thereby suggesting that ESG information is indeed a relevant factor in investor valuation decisions.
Research Article
Open Access