How does China's stock market react to supply chain disruptions from COVID-19?

As a once-in-a-century global pandemic, COVID-19 severely hit the global economy and disrupted the worldwide supply chain. Based on 505 Chinese firms, we use the event study method to explore the effect of COVID-19 on the financial performance of firms. The findings show that COVID-19 has an immediate impact on Chinese firms. Hubei firms experience stronger effects than non-Hubei firms. Supply chain disruptions effects from COVID-19 are observed. Transportation industry is hit more severely than retail industry. Insurance companies experience a strong adverse effect. On the other hand, both medical and competitor firms experience significantly positive spillover effects.