ESG
Quiet ESG May Be A Market Signal
Knowledge at Wharton covered research on greenhushing, where companies say less about environmental work than outside evidence suggests they are doing. The study analyzed earnings-call language and external environmental signals from thousands of U.S. firms, finding a link between understated communication and higher subsequent abnormal returns.
The useful distinction is between silence and credibility. The research does not argue that firms should hide impact work; it argues that investors may punish rhetoric that runs ahead of conduct. For leaders, the lesson is to manage environmental language with the same discipline as financial disclosure.
Source: Knowledge at Wharton · September 8, 2026