US and Iran sign memorandum of understanding to halt fighting and reopen Strait of Hormuz

The United States and Iran signed a 14-point memorandum of understanding on June 15, effectively ending hostilities and reopening one of the most critical chokepoints in global trade. The agreement, known as the Islamabad Memorandum of Understanding, addresses the Strait of Hormuz directly, mandating the restoration of commercial shipping traffic and lifting the US naval blockade of Iranian ports.

For crypto markets, the signal was immediate. Bitcoin prices climbed following the public release of the MoU text on June 17, while oil prices moved in the opposite direction.

What the deal actually says

The immediate provisions are concrete. The US naval blockade of Iranian ports lifts upon signing. Iran must restore pre-war shipping volumes through the Strait of Hormuz within 30 days. Commercial vessels get toll-free passage for at least 60 days after traffic volumes return to normal.

On the military side, the agreement calls for the immediate and permanent termination of operations on all fronts, including Lebanon.

A 60-day window for nuclear negotiations begins under the MoU’s terms. During that period, temporary sanctions waivers for limited Iranian oil sales become possible, giving Iran an economic incentive to stay at the table without requiring the US to make sweeping concessions upfront.

The signing ceremony itself was conducted digitally. US President Trump, Vice President JD Vance, and Iranian Parliament Speaker Mohammad Bagher Ghalibaf all participated. Pakistan and Qatar served as mediators.

Why the Strait of Hormuz matters this much

Roughly a fifth of the world’s oil passes through the Strait of Hormuz on any given day. The tensions that led to this MoU had been building since early 2026, with the US naval blockade of Iranian ports representing a significant escalation.

For energy markets, the implications are straightforward. More Iranian oil reaching global markets, even through limited sanctions waivers, increases supply. Oil prices already reflected this expectation by declining after the MoU text became public on June 17.

What this means for crypto investors

Bitcoin rose on the news. The more interesting question is whether this momentum sustains. The MoU is explicitly a framework, not a final deal. The 60-day nuclear negotiation window means there’s a built-in deadline that markets will watch closely.

The compliance-based structure of the MoU means that any Iranian deviation from its terms could trigger a rapid reversal of the current optimism. The smart move is watching the 30-day shipping restoration deadline as the first real test of whether this agreement holds.

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