Morningstar DBRS Publishes Final Global Methodology for Rating Public-Private Partnerships

Why It Matters

The methodology standardizes PPP credit evaluation, boosting transparency and influencing financing terms for infrastructure projects worldwide.

Key Takeaways

• Six design/construction risk factors now equally weighted
• Contractor credit default assumed B without rating
• Operating risk scales expanded to ccc rating
• Weaker phase determines overall intrinsic assessment
• Potential one‑notch upgrade for one existing issuer

Pulse Analysis

The public‑private partnership (PPP) market has grown into a cornerstone of global infrastructure financing, yet rating consistency has lagged behind. Morningstar DBRS’s new Global Methodology addresses this gap by codifying a transparent, data‑driven approach that aligns credit analysts, investors, and project sponsors. By publishing the criteria publicly, DBRS reinforces its role as a benchmark setter, allowing market participants to benchmark risk more reliably and compare projects across jurisdictions.

Key enhancements focus on the construction and operating phases. A six‑point design and construction risk assessment, paired with an equally weighted contractor risk assessment, yields a Comprehensive Completion Risk metric that feeds directly into the Intrinsic Assessment during construction. On the operating side, the rating scale now stretches to ccc, offering finer granularity for lower‑rated assets. Explicit weightings for Business Risk Assessment (BRA) and Financial Risk Assessment (FRA) factors, along with dedicated adjustments, streamline the evaluation of refinancing risk, counter‑party constraints, and lifecycle resilience, especially for self‑performing O&M arrangements.

For investors and issuers, the methodology’s emphasis on the weaker phase dictating the overall rating underscores the importance of holistic risk management throughout a project’s lifecycle. The clarified adjustment mechanisms and additional considerations—such as parent‑subsidiary relationships and sovereign constraints—provide clearer pathways for rating upgrades or downgrades. While only one issuer may see a one‑notch improvement, the broader market can expect heightened rating transparency, potentially lowering capital costs for well‑structured PPPs and sharpening due‑diligence processes across the sector.