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A striking first half underwriting gain has arrived just as casualty executives are defending rate, reserve, and attachment decisions against slower premium growth, heavier distribution pressure, and political sensitivity around insurance affordability. The industry looks more profitable on its face, but commercial auto, umbrella, and excess liability portfolios still carry unresolved questions about severity, capital use, and timing.
This week’s deep dive covers:
Why first-half profit overstates the improvement in underlying underwriting
Where recent casualty accident years are still developing adversely
How reinsurance and property relief can weaken the signal for casualty discipline
1. The catastrophe benefit was larger than the combined ratio improvement
Catastrophe loss relief explains more than the visible improvement in the industry combined ratio. AM Best reported that United States property and casualty carriers generated $31.2 billion of net underwriting income in the first half of 2026, nearly three times the $10.9 billion recorded in the first half of 2025. The combined ratio improved to 92.5 from the prior year period, a four point movement. Catastrophe losses accounted for 6.2 points of the first half 2026 combined ratio, down from 10.8 points in the first half of 2025.
That arithmetic matters, and it is worth stating plainly rather than leaving it implied.
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