An Iranian lawmaker’s call for control over the Strait of Hormuz as a condition for extending the US-Iran ceasefire has injected a new variable into negotiations. The market for extending the ceasefire by April 21, 2026, sits at 65.5% YES.

Market reaction

The Hormuz demand complicates ceasefire negotiations directly. Odds for an April 21 ceasefire breach announcement are at 28.5% YES. Traders see a clear escalation window: the largest jump between April 14 and April 21 (+26pts) suggests anticipation of a specific catalyst in that period. The April 14 market, at 3%, is effectively a non-factor.

Why it matters

The US-Iran ceasefire extension market has $40,289 in actual USDC traded, with a $5,093 move needed to shift odds by 5 points. The largest price move was a 3-point spike at 7:29 PM, showing the market’s sensitivity to new geopolitical inputs. The Strait of Hormuz carries roughly 20% of global oil transit, so Iran’s claim cuts directly against US strategic interests in the region.

What to watch

At 66¢, a YES share pays $1 if the ceasefire is extended by April 21, a 1.52x return. Buyers at that price need to believe a diplomatic breakthrough happens within seven days. Watch for movement from intermediaries like Pakistan, or statements from Trump, that signal a shift in negotiation terms. New rhetoric or the announcement of fresh talks could move odds quickly in either direction.

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