Understanding how credit ratings impact borrowing costs is essential – yet often misunderstood.
This note goes beyond the usual narratives around upgrades and downgrades to explain a more subtle reality:
➡️ Credit ratings do not set prices directly.
➡️ They shape investor behaviour, constraints, and benchmarks – which ultimately drive pricing.
We highlight several key transmission channels:
Risk perception → influences credit spreads
Threshold effects → especially at the Investment Grade / High Yield boundary
Regulatory frameworks → capital and solvency requirements
Benchmarking dynamics → relative value across issuers
One important takeaway:
The impact of ratings is often non-linear and strongest at key thresholds, where market structure and mandates amplify their effects.
For issuers, investors, and policymakers, understanding these mechanisms is critical to interpreting market movements and financing conditions.
