U.S. President Donald Trump’s directive to resume U.S. nuclear weapons testing is the first in more than 30 years It has reignited not just geopolitical fears but also an important question for the insurance industry. What happens when industrial risk moves beyond the realm of insurability?
In his announcement, Trump mentioned the need to “keep pace” with the nuclear ambitions of Russia and China. However, beyond the diplomatic fallout, the call underscores a more immediate reality for insurers and brokers. Certain risks, especially nuclear-related and war-adjacent exposures, are fundamentally excluded from standard commercial coverage.
Nuclear testing sits outside the boundaries of conventional underwriting. From catastrophic contamination to geopolitical upheaval, the potential losses defy actuarial risk modeling. Under virtually all commercial property and casualty (P&C) policies, nuclear events are excluded through absolute pollution and war clauses. These clauses are designed to insulate carriers from systemic, civilization-scale losses.
These exclusions, once just academic, are becoming operationally relevant again. If nuclear tensions and dangers of war rise, energy, logistics, aviation, and reinsurance markets could see cascading effects. These range from disrupted supply chains and market volatility to investor flight and reduced capacity for high-risk sectors.
One industry analyst said, “Nuclear incidents are the very definition of uninsurable. They’re not just catastrophic – they’re existential. The underwriting language was never designed to absorb state-level, global-impact events.”
The renewed harsh nuclear rhetoric comes as the insurance industry is already re-examining the breadth of war exclusions in the cyber, political risk, and property markets. The line between state-sponsored aggression and private-sector fallout has blurred causing insurers to take note.
Eric Schmitt is the CISO at Sedgwick. He said, “We’ve been watching the war exclusions very closely. If you look back to what happened with NotPetya – where what could be argued as an attack by a nation-state against another nation-state took down a number of different companies, wholly unrelated – the war exclusions are now taking a much broader brush than what they have in the past.”
That precedent has changed policy language across multiple specialty lines. Cyber, energy infrastructure, and marine insurers have tightened exclusion. They are clarifying that even indirect losses from acts of war or nuclear contamination fall outside coverage. In reinsurance, the conversation has moved toward capital resilience and event aggregation. This is particularly true in the face of potentially simultaneous geopolitical and environmental triggers.
Nuclear escalation sits far outside the realm of insurable risk. For brokers and clients alike, this situation underscores a fundamental truth: insurance exists to absorb the unpredictable, not the inevitable. Acts of God and acts of war have always marked the boundaries of coverage, reminding markets that some extreme events defy both modeling and indemnity.
The absolute exclusions that shield carriers from nuclear, radiological, and war-related losses are not simply legal footnotes. They are the solid bedrock of commercial P&C underwriting. From property to energy, aviation to reinsurance, these risk exclusions define the edges of the industry’s promise. If state actions or weapons testing enter the equation, the entire notion of shared, transferable risk collapses.
For the insurance industry, Trump’s call to resume testing is a reminder of where the insurance contract ends and where the uninsurable begins.