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Innovation Through a Net Zero Economy and the Impact to an Investors Bottom Line

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2026-05-07

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Carrington, Patricia. 2026. Innovation Through a Net Zero Economy and the Impact to an Investors Bottom Line. Masters Thesis, Harvard University Division of Continuing Education.

Abstract

The accelerating impacts of climate change represent a defining challenge of our era. From escalating physical risks like extreme weather events to transition risks stemming from policy shifts and technological disruption, the economic implications of a warming planet are increasingly undeniable and far reaching. The Intergovernmental Panel on Climate Chage (IPCC) has highlighted the urgent and substantial need for increased financial capital to effectively mitigate greenhouse gas (GHG) emissions and adapt to unavoidable climate impacts, noting that current global financial flows are insufficient and must increase “many-fold” to achieve climate goals (IPCC, 2022). The role of the corporate sector, particularly the largest and most influential companies, has become paramount. Comprising 500 of the leading U.S. equities, the S&P 500 index represents over $55 trillion (S&P Global, 2025). This immense scale not only signifies their substantial contribution to global economic activity but also highlights their considerable capacity and responsibility to mobilize the necessary capital to drive meaningful climate action (World Resources Institute, 2023). Their role is central not only because of their emissions footprint, but also because of their influence in shaping investor expectations and capital allocation (Wright & Nyberg, 2024). Therefore my thesis examined if commitments to reduce GHG emissions has compromised financial performance among S&P 500 companies. The analysis explored the performance differential between S&P 500 companies with and without Science Based Targets (SBT). Specifcially it examined the performance of companies with SBT commitments. The primary financial performance metric or dependent variable was total shareholder return (TSR). While previous research has indicated a positive link between environmental performance and financial performance, this study sought a more granular understanding of how specific attributes of SBT initiative (SBTi) commitments influence financial outcomes. To investigate these relationships, a matched pair approach combined with quantitative regression analysis was employed. The sample matched companies included in the S&P 500 index from 2015-2025 based on factors such as market capitalization, product focus, geographic focus and revenue similarities. Statistical methods, including paired t-tests and panel regression analysis tested if financial performance was higher for SBTi committed companies during this period. The results indicated that SBTi commitment does not confer a detectable TSR premium or penalty in the S&P 500 when evalated through a direct comparison of means. However, a modest positive post-commitment shift emerged when examining firms relative to their matched controls over time, albeit with substantial heterogeneity across industries. This suggests that while SBTi commitments do not appear to influence shareholder returns uniformly, certain sectors or firm types may experience more favorable market responses following the publication of climate targets. These findings carry several implications for researchers, regulators, practitioners and the SBTi attempting to assess the financial consequences of adopting SBT commitments. First, the absence of a statiscially significant TSR effect suggests that investors do not uniformly reward or penalize firms for announcing SBTi commitments. This indicates that market participants may view such disclosure as neither inherently value additive or destructive, but instead a component of a broader strategic and sector related narrative. Second, the modest positive shifts observed in the DiD analysis, combined with substantial heterogeneity across industries, imply that the financial implication of SBT adoption are likely contingent on contextual facors such as sectoral growth dynamics, technological innovation and firm specific capabilities. Industries facing stronger regulatory or transition pressures may interpret credible climate targets as signals of operational resilience, whereas other sectors my see limited performance sensitivity. Finally dispersion highlights the need for future work to investigate the mechanisms driving divergent outcomes, such as differences in implementation crediblity, governance culture and core business models. Together, these implications emphasize that while SBT commitments do not systematically shift shareholder returns, they may interact with deeper structural and strategic factors in ways that produce meaningful performance effects.

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Sustainability

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