Will the United States and Iran reach a formal nuclear agreement by the end of Q4 2026?
What moved
Iran closed the Strait of Hormuz to most ships in response to attacks by the United States and Israel; a closure of the transit point for roughly 20 percent of seaborne oil and significant shares of ammonia, urea, phosphate and helium halts flows with no maritime alternative.
The market transmission
Oil faces an immediate supply shock with no sea route around Hormuz; crude repricing will dominate energy markets. Fertilizer and helium flows are severed and will show in agricultural input costs and industrial supply chains within days. The lack of spare capacity in crude and the absence of any alternative routing makes this a first-order repricing event, not a risk premium.
What would change this
The closure is stated as covering most ships rather than all traffic, leaving ambiguity on whether any flows continue. The timeframe from early March suggests this may already be reflected in current prices depending on the source publication date. Helium scarcity will lag other impacts as inventories buffer near-term demand. The fertilizer channel matters more for agricultural futures than for energy complex.
Directional leans
BRENT ▲ highWTI ▲ highWHEAT ▲ moderateCORN ▲ moderate