Paper: arXiv 2501.14391

Authors: Ricardo Crisostomo

Abstract

We estimate the loss of value that companies might suffer from nature overexploitation. We find that global equities shed 26.8% in a scenario of unabated nature decline, while the worst-performing firms lose ~75% of their value. Our risk framework considers five environmental hazards: biodiversity loss, land degradation, climate change, human population and nature capital. We also introduce two metrics to assess nature-related risks: a Country Degradation Index that tracks the damage caused by environmental hazards in specific territories, including nonlinear dynamics and tipping points; and a Nature Risk Score that summarizes the risk that companies face due to the decline of nature and its services.

Complexity vs Empirical Score

  • Math Complexity: 4.5/10
  • Empirical Rigor: 6.8/10
  • Quadrant: Street Traders — practical and empirical, lighter on theory

Why this score: The paper provides a timely and practical framework for quantifying nature-related equity risks using scenario modeling across global datasets. While conceptually strong and empirically broad across 1,454 MSCI World firms, the underlying mathematical modeling relies more on applied scoring logic and cash-flow projections rather than advanced theoretical math proofs.

Research Flowchart

  flowchart TD
    A["Research Goal: Quantify Firm-Level Risk<br/>from Nature Deterioration"] --> B["Data Inputs: 5 Environmental Hazards<br/>(Biodiversity, Land, Climate, Pop., Capital)"]
    B --> C["Calculate Country Degradation Index (CDI)<br/>(Accounts for Tipping Points)"]
    C --> D["Compute Nature Risk Score (NRS)<br/>for Individual Companies"]
    D --> E["Model Financial Impact on<br/>Global Equity Valuations"]
    E --> F["Outcomes: 26.8% Global Equity Loss<br/>& Up to 75% Loss for Worst Firms"]