A sharp escalation in military tensions in the South China Sea this week is raising alarm among marine insurers, with the latest standoff between Chinese and Philippine forces – backed by real-time US surveillance – heightening perceptions of war-risk exposure across the region.
Australian defence minister Richard Marles is in Manila as part of the largest-ever joint combat drills between Australia and the Philippines, involving over 3,600 troops, F/A-18 jets, guided missile destroyers, and live-fire exercises under “Exercise Alon.”
The drills coincide with a new territorial confrontation at Second Thomas Shoal, where China has deployed a growing fleet of coast guard and suspected militia ships – some equipped with heavy-caliber weapons – within close range of the BRP Sierra Madre, a Philippine military outpost.
Rear Adm. Roy Trinidad of the Philippine Navy described China’s actions as “coercive and aggressive,” including net blockades, high-speed incursions, and even water cannon drills. “We will not back down,” he said, vowing to defend Philippine sovereignty.
For the marine insurance market, the implications are immediate.
Heightened war-risk perception is likely to trigger premium hikes for vessels transiting contested waters. Similar geopolitical flashpoints, such as the Red Sea and Strait of Hormuz, have seen war-risk premiums rise by 20% or more. Underwriters may reclassify parts of the South China Sea as high-risk zones, especially around hot spots like Second Thomas and Scarborough Shoals, where recent confrontations occurred.
This raises operational costs for shippers, who may be forced to reroute via the Philippine Sea or Indonesia, incurring delays and increased fuel usage – estimated to add 3-7% to voyage costs. Analysts warn of supply chain impacts for bulk commodities, oil, and electronics, and fragmentation of the insurance market, as some insurers pull back from volatile routes.
Should tensions escalate, government intervention – including war-risk backstops or emergency guarantees – may be required to ensure trade continuity through one of the world's most critical shipping corridors, which handles nearly 28% of global maritime traffic.
Will insurers reclassify the South China Sea as a war-risk zone? Let us know what you think.
