UConn Study Finds Voluntary Corporate Climate Goals Boost Stock Returns and Firm Value

A new study from UConn researchers published in Management Science shows that when S&P 500 companies announce voluntary carbon reduction goals, their stock prices rise by an average of 0.65%, adding roughly $490 million in firm value. The effect is strongest for high-emitting firms, where each ton of CO2 pledged to be eliminated increases value by $75. Investors view these commitments as signals of strong management and lower regulatory risk, not just environmental gestures. The research, led by Ph.D. candidate Lukas Schnabel and professor Stefan Hock, analyzed a broad sample of firms across industries. It found that detailed, credible targets with clear business impact generate a more positive market response than vague promises. The authors advise companies to announce goals early relative to industry peers, as the positive effect diminishes over time. This suggests markets increasingly see climate action as an investment in resilience and long-term value, not a cost.