Niche property lines surge: Where relative growth is reshaping US insurance markets

Massachusetts posted the highest single-state percentage growth across its property sub-lines, with private flood profits rising a whopping 1,221%, from $1.3 million in 2022 to $17.8 million in 2024. Wisconsin followed with an 852% increase in commercial multiple peril (non-liability portion), while Louisiana and Rhode Island saw ocean marine profits surge by 779% and 476%, respectively. Oregon’s Fire line grew by 663%, rounding out the top five. 

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