The emergence of non-fungible tokens (NFTs) and decentralised finance (DeFi) has significantly reshaped the digital asset landscape, introducing new value creation, trading, and decentralised governance paradigms. However, alongside this innovation, the energy-intensive nature of blockchain operations—particularly those based on proof-of-work consensus mechanisms—has drawn considerable scrutiny for their environmental toll. The issue became even more pronounced following China’s sweeping ban on cryptocurrency mining in 2021. This crackdown prompted a mass exodus of mining operations to other jurisdictions, many of which rely heavily on fossil fuels for electricity generation. Consequently, the migration exacerbated the carbon emissions associated with blockchain-based activities, fuelling an intensifying global debate about the ecological sustainability of crypto technologies and drawing attention to the potential of carbon offsetting mechanisms as a mitigating strategy.

Amid this discourse, a pivotal study published in China Finance Review International offers new insights into the interrelationships between NFTs, DeFi, and global carbon allowance markets. The research breaks ground by examining these intersections during periods of pronounced market stress, providing a much-needed analytical framework for understanding how environmentally focused financial instruments and digital assets interact. These findings are especially timely as global regulatory bodies and climate conferences—such as the upcoming COP29—grapple with formulating coherent responses to the twin imperatives of digital innovation and environmental stewardship. By analysing the dynamic interplay among emerging asset classes and carbon markets, the study is a vital resource for investors, financial regulators, and technology developers.

The study employs sophisticated econometric tools to assess data from four key financial indices from January 2021 to May 2023. These include the NFT Index (NFTI), which captures the performance of primary NFT tokens; the DeFi Pulse Index (DPI), which measures the value of decentralised financial assets; the KraneShares Global Carbon Strategy ETF (KRBN), representing international carbon credit markets; and the Solactive Carbon Emission Allowances Index (SOLCARBT), which tracks carbon futures within the European Union Emissions Trading System. The analysis encompasses several major economic and geopolitical disruptions, including the COVID-19 Delta and Omicron waves, the Russia-Ukraine war, and the collapse of the FTX cryptocurrency exchange. These events provided a fertile ground for investigating the structural connectedness and tail dependencies between digital and carbon-related financial systems.

One of the most compelling findings of the research is the asymmetric transmission of market shocks between asset classes depending on the prevailing market regime. During bull markets, DeFi instruments (as captured by the DPI) act as dominant transmitters of volatility, indicating their broader influence within the financial ecosystem. On the other hand, NFTs tend to remain relatively isolated except under extreme quantile conditions, at which point they begin to transmit idiosyncratic shocks. Conversely, the dynamic reverses in bearish or crisis-ridden environments: carbon markets such as KRBN and SOLCARBT become the primary sources of systemic disturbance. At the same time, NFTs emerge as the most susceptible receivers of such shocks. These patterns underscore risk propagation’s fluid and context-dependent nature in the contemporary financial landscape.

Another key insight lies in the concept of tail dependence, which refers to the increased correlation between assets during periods of extreme stress. The study reveals that during systemic shocks—such as those induced by pandemics or armed conflict—tail dependence among NFTs, DeFi, and carbon assets intensifies dramatically. This phenomenon suggests that digital and environmental markets are more tightly coupled under duress than previously assumed and that portfolio diversification strategies relying on these assets may prove less effective when they are most needed. This revelation has crucial implications for risk management and strategic asset allocation in an increasingly digitised and climate-conscious investment environment.

The broader relevance of the research extends far beyond academia. As international stakeholders debate how to reconcile the carbon footprint of blockchain technologies with global climate objectives, this study offers a practical foundation for developing market-based responses. For example, Web3 investors may use these findings to hedge against carbon exposure by incorporating carbon credits into their decentralised portfolios. Financial innovators could design green fintech products that remain resilient during crises by accounting for the dynamic shock transmission behaviours elucidated in the study. Most importantly, policymakers and environmental regulators now have a valuable early-warning framework for identifying climate-finance systemic risks that may arise from the intersection of digital and carbon markets.

In practical terms, the implications are manifold. For traders, the research opens avenues for short-term arbitrage strategies, particularly between Ethereum options and carbon futures during periods of blockchain congestion. For regulatory agencies, the findings could inform the development of predictive models that flag systemic risks arising from climate and crypto interactions. Finally, for decentralised autonomous organisations (DAOs), the evidence provides a compelling case for integrating carbon offset mechanisms into their governance protocols, thereby aligning technological growth with sustainability imperatives. As the global community looks toward COP29 and beyond, such research offers both a roadmap and a warning—highlighting the profound and increasingly inseparable links between finance, technology, and the environment.

More information: Bikramaditya Ghosh et al, Is there a nexus between NFT, DeFi and carbon allowances during extreme events? China Finance Review International
. DOI: 10.1108/CFRI-03-2023-0057

Journal information: China Finance Review International Provided by Shanghai Jiao Tong University Journal Center