'For company decisionmakers, there is clearly no argument for not considering it'
As companies face increasing pressure to address climate change, many are choosing to publicly announce voluntary carbon-elimination goals.
Two UConn researchers have discovered that, in addition to highlighting environmental responsibility, these commitments also influence how investors perceive the value of a company.
Published in Management Science in June, The Impact of Voluntary Carbon Goal Announcements on Stock Returns examines how stock markets respond when firms disclose voluntary carbon goals. The findings show that those announcements have a positive effect on stock returns, reflecting investor beliefs about both the costs and benefits of corporate climate action.
By analyzing a broad sample of S&P 500 firms, the team found that companies experience an average positive abnormal return of 0.65% following the announcement of voluntary carbon goals. Although this might not sound especially impactful, this effect corresponds to an average increase of approximately $490 million in firm value for the companies in the sample. The results suggest that investors may interpret these commitments as value-enhancing actions.
"We went into this study with an open mind and the research clearly indicated that it was financially beneficial,'' says Ph.D. candidate Lukas Schnabel. "We were excited about this study because it looked at a large sample of businesses across a vast swath of industries. We found a big argument in favor of announcing voluntary carbon goals.''
Schnabel collaborated with his advisor, UConn marketing professor Stefan Hock, and two colleagues from Freie Universität Berlin in Germany, professor Sascha Raithel and Ph.D. candidate Setareh Heidari. The project took almost 3 ½ years to complete.
The Management Science study points to several factors driving this reaction. Voluntary carbon goals can serve as credible signals of strong management and long-term strategic planning. Companies that proactively address climate risks may be better poised to navigate future regulatory changes and shifting market demands, which investors increasingly weigh in valuation decisions.
Schnabel noted, however, that the market response is not uniform across the board. A positive effect is more pronounced for companies with higher emissions. For these firms, committing to emission reductions may carry greater informational value, indicating meaningful operational changes rather than superficial promises.
"For each ton of CO2 promised to be eliminated, firm value increased by $75,'' Schnabel says. "For company decisionmakers, there is clearly no argument for not considering it.''
The study also highlights the importance of communicating the expected business impact of carbon goals. Investors appear to respond more favorably when firms provide thought-out targets and how they will impact the firm's business, rather than vague aspirational goals. This finding underscores the importance of transparency and accountability in corporate sustainability actions, Schnabel says.
"The details are important because they add to the company's credibility,'' he says. "In the end, investors care deeply because it indicates that companies are staying ahead of regulatory changes and avoiding forced mandates, which can be very expensive. Investors appreciate companies that pre-emptively tackle those concerns.''
Hock agrees.
"Future legislation might dictate 'transition risk,''' he says. "With voluntary carbon goals, companies are indicating that they are in the driver's seat, they're taking destiny in their own hands, and they're erasing risk. The stock market appreciates that.''
The researchers were also able to offer recommendations on how and when such announcements should be made. Their findings show that the positive effects of emphasizing the business implications of the announcement and committing to reductions in current higher emissions tend to diminish over time. These findings suggest that corporate leaders should avoid delaying such announcements relative to their industry peers in order to maximize the positive reaction from the stock market.
The new research contributes to a growing body of work focused on finance and sustainability, offering evidence that environmental initiatives can and do align with shareholder interests. Rather than viewing climate-focused commitments solely as expenses, markets may increasingly see them as investments in resilience, risk reduction, and long-term value creation, Hock says.
