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Use the contract’s stated definitions
This fictional contract measures improvement as (ending score − baseline score)/baseline score. The baseline is fixed at 62, the ending score is 70, and the increment applies at an improvement of at least 10%. The fee base is constant at 500 million for the whole year. The example stipulates this arithmetic condition; it does not establish that any real ESG rating is a ratio scale.
Test the condition first
The stated improvement is 8/62, approximately 12.903%. It exceeds the 10% condition, so the 5-basis-point increment applies. The total fee rate is 45 + 5 = 50 basis points, or 0.005 in decimal form.
| Component | Amount |
|---|---|
| Base fee: 500 million × 0.0045 | 2.25 million |
| Triggered increment: 500 million × 0.0005 | 0.25 million |
| Total annual fee | 2.5 million |
Check the boundary implied by the baseline
A 10% improvement on a baseline of 62 requires an ending score of 68.2. Because the condition says “at least,” an ending score exactly equal to 68.2 would trigger the increment under this exercise. Rounding a reported score before checking the condition could change a boundary decision.
Keep the fee result separate from impact and return
The fee follows the stipulated contract terms. A score change does not by itself identify an issuer’s operational improvement, investor return or real-world impact. A variable fee base, partial-year period or different score convention would require a different calculation.