Tanker owners are lucky if they can even reroute around the Cape of Good Hope now. The navigation equipment on several reefs south of the Strait of Hormuz was knocked out last night, and the Revolutionary Guard declared that the smuggling route had been completely shut down. It sounds like a battlefield report, but in reality, it’s another half-turn of the valve squeezing oil prices. Don’t underestimate that navigation equipment on those reefs. It isn’t there to make the sea look pretty; it’s the “eyes” that help ships entering and leaving the Gulf with positioning, reef avoidance, and course corrections. Once that equipment fails, a shipowner’s first reaction isn’t to save fuel—it’s to spend more: on insurance, escorts, and backup routes. In the shipping market, even a few thousand dollars more in daily VLCC charter rates adds a real cost per barrel when spread across a two-million-barrel cargo. And if war-risk premiums climb above 0.1% of a vessel’s value, that’s enough to make traders recalculate the landed cost.

The longer you watch the markets, the more you start seeing what you want to see. I’ve been watching the crude oil chart, with freight and insurance costs rising in my mind. Take the 2021 Ever Given blockage of the Suez Canal: it lasted just six days, but some tankers rerouted around the Cape of Good Hope, adding more than ten days to their voyages, and freight and insurance costs immediately jumped. After the 2019 attacks on tankers in the Gulf of Oman, war-risk surcharges on routes from the Middle East to Asia also spiked sharply for a while. And the Strait of Hormuz itself is the choke point for global energy shipments: around 17 million to 20 million barrels of crude oil and refined products pass through it every day, accounting for nearly one-third of seaborne crude oil worldwide. At that scale, any statement that a “route is closed”—even if only the smuggling route—is something the market will first translate into a risk premium.

Rerouting around the Cape of Good Hope is no free lunch, either. From the Persian Gulf to Europe, bypassing the Red Sea and Suez Canal typically adds 10 to 14 days to the voyage. Every extra day a ship spends at sea means another day of charter, fuel, crew, and insurance costs; and when schedules get disrupted, deliveries to Asian refineries are thrown off, too. The Revolutionary Guard’s claim that the “smuggling route has been completely shut down” may look like an enforcement bulletin, but in practice, it’s telling the market that the cost of using this gray-market route needs to be repriced. With less gray-market supply, compliant crude gains more bargaining power. Oil prices may not surge immediately, but freight and insurance costs will move first, seeping through the cracks like water.

Maybe I’m wrong and I’ll be proven so. After all, oil prices depend on more than the Strait of Hormuz: inventories, demand, the dollar, and OPEC+ production policy all matter. Sometimes a war report sounds alarming, but prices fall because supply hasn’t actually been disrupted. Still, I can’t help watching that chart, because freight and insurance don’t lie. When they rise, they’re usually the first to tell you the market is feeling the pain.