The insurance-linked securities (ILS) fund sector has delivered its highest single month of investment returns on record in September 2025 according to the ILS Advisers Fund Index, as strong premium accrual, coupon earnings and a benign loss environment combined to drive exceptional performance.
Investors in the insurance-linked securities (ILS) market have now enjoyed positive returns since February, with only January of 2025 dented by the extreme wildfire losses that affected California.
Performance has been building steadily with seasonality as well, with four months in succession now above 1% each, but September has seen ILS fund returns accelerate to a new record high for any month in the ILS Advisers Index’s history.
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