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Navigating the Green Tightrope

November 5, 2025
By: Alex Cheema-Fox, Megan Czasonis, Piyush Kontu, George Serafeim
Summary

By Alexander Cheema-Fox, Megan Czasonis, Piyush Kontu, and George Serafeim

 

We investigate reliance on carbon offsets for decarbonization, associated risks, and factors that explain variation in offset prices.

 

Relying on carbon offsets for decarbonization has become an increasingly contentious approach in the fight against climate change. Many companies view the purchase of credits in carbon reduction or removal projects, such as reforestation or renewable energy initiatives, as an effective way to offset their green house emissions. However, critics argue that offset reliance is a temporary solution that allows for continued emissions rather than addressing the root cause. In a recent paper, we investigate firm reliance on carbon offsets and find that companies tend to use carbon offsets as a complement to their decarbonization activities rather than a substitute. Moreover, we find little evidence that market-based or analyst-derived risk measures reflect the inherent risk associated with offset reliance. Finally, we explore key factors, such as project type and geography, that explain carbon offset quality and prices.

 

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Author Bios
Alex Cheema-Fox
Alex Cheema-Fox is Managing Director and Head of Investor Behavior and Sustainability Research at State Street Markets
Megan Czasonis
Megan Czasonis is Managing Director and Head of Portfolio Management at State Street Markets
Piyush Kontu
Piyush Kontu is Assistant Vice President and Quantitative Researcher at State Street Markets
George Serafeim
George Serafeim is a professor at Harvard Business School and partner of State Street Associates
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1. Peter L. Bernstein Award for Best Article in an Institutional Investor Journal in 2013; Bernstein-Fabozzi/Jacobs-Levy Award for Outstanding Article in the Journal of Portfolio Management in 2006, 2009, 2011, 2013 (2), 2014, 2015, 2016, 2021; Graham & Dodd Scroll Award for article in the Financial Analysts Journal in 2002 and 2010. Roger F. Murray First Prize for Research Presented at the Q Group Conference in 2012, 2021, 2023. Harry M. Markowitz Award for Best Paper in the Journal of Investment Management in 2022, 2023. Doriot Award for Best Private Equity Research Paper in 2022.