Arch Capital Group Property, energy, marine and aviation — Year One increased by 7.0% to 23.0% in Q4 2025 compared to the prior quarter. Year-over-year, this metric grew by 7.0%, from 21.5% to 23.0%. This increase may warrant attention — for this metric, lower values are generally preferred.
Early-year loss development provides an initial indicator of the profitability of the underwriting year.
This represents the development or loss experience specifically observed during the first year following the inception o...
Standard actuarial metric used in loss development triangles to project ultimate losses.
acgl_segment_property_energy_marine_and_aviation_year_one| Q4 '21 | Q4 '22 | Q4 '23 | Q4 '24 | Q4 '25 | |
|---|---|---|---|---|---|
| Value | 19.3% | 20.3% | 20.5% | 21.5% | 23% |
| QoQ Change | — | +5.2% | +1.0% | +4.9% | +7.0% |
| YoY Change | — | +5.2% | +1.0% | +4.9% | +7.0% |