We investigate the capital-market effects of the release of environmental, social, and governance (ESG) scores on the Bloomberg Professional Terminal. To estimate causal effects for a group of treated companies (i.e., stocks with newly available ESG scores), we exploit the unanticipated publication of Sustainalytics ESG scores vis à vis a matched control group in a difference-in-difference setting. We find a significant increase in market liquidity and abnormal returns in the treated group. The most substantial effects prevail in regions with lower ESG awareness and for companies with above-median ESG scores.