Evaluating sustainability of capital flows in nature markets

The presentation proposes a theoretical framework for evaluating the sustainability of capital flows in nature markets. Nature and biodiversity markets are structurally illiquid and incomplete due to social-ecological non-fungibility, spatial and temporal interdependence, path-dependence, context-dependent value creation and incompleteness of tradable claims. Nature markets derive and convert value into transactions from underlying social-ecological assets whose regenerative capacity and biodiversity composition evolve over time. The analysis models social-ecological assets as reproductive systems whose cash-flow potential depends on ecosystem condition and resilience, biodiversity attributes, spatial configuration, and interactions with surrounding non-marketed social-ecological systems. Because of structural illiquidity, policy measures are required to establish standardization of tradable units, verification infrastructure, contractability and scalability to mobilize capital. In offsetting markets, bankability is facilitated through enforcement of liabilities and predictable returns from restoring land plots. Nature-based value creation is still subject to a variety of risks that can be addressed through risk sharing, financial structuring and complementary measures ensuring resilience and climate adaptation.  Under these conditions, liquidity, price formation, and risk are partially endogenous since they arise from social-ecological feedbacks, information asymmetries and institutional architecture and not only from exogenous market depth. To remain investible, nature markets need to balance social-ecological with financial stability over time. To structure these dependencies, the paper introduces a sustainability function H(x) that maps a vector of market design variables - such as unit definition, standardisation, verification cycles, liability rules, and diversification - onto a scalar measure of market sustainability. H(x) characterises the regions in which capital flows remain aligned with long-term ecological integrity, biodiversity resilience, and stable financial return expectations. By extending insights from financial-stability theory (e.g. Brunnermeier & Pedersen, 2009) to biodiversity markets, the framework seeks to describe how different architectures can generate stable or unstable equilibria depending on social-ecological feedbacks, information asymmetry and institutional incompleteness. The model provides a conceptual basis for evaluating when capital allocation into biodiversity outcomes becomes regenerative, extractive or self-undermining.