The ceasefire between the United States and Iran is showing major signs of breaking down after President Donald Trump rejected Tehran’s latest counterproposal to end the conflict.

Speaking from the Oval Office on Monday, Trump described the agreement as being “on massive life support,” warning that the chances of the truce surviving are now extremely low.

The comments immediately intensified concerns across global markets, especially as tensions continue around the Strait of Hormuz — one of the world’s most critical oil shipping routes.

Here’s what happened and why it matters.

The situation is no longer just about diplomacy between Washington and Tehran.

A collapse of the ceasefire could disrupt global energy supplies, trigger another spike in oil prices, and increase the risk of military escalation across the Middle East. Around one-fifth of the world’s oil trade normally passes through the Strait of Hormuz, making any instability there a major concern for governments and financial markets worldwide.

Oil markets already reacted sharply after Trump dismissed Iran’s latest proposal as “totally unacceptable.” Brent crude climbed above $103 per barrel as traders prepared for the possibility of a longer regional conflict.

The ceasefire was originally announced on April 8 after weeks of military escalation between the U.S., Israel, and Iran. It was intended to temporarily halt hostilities while negotiations continued.

Now, that diplomatic window appears to be closing.

President Trump said Monday that Iran’s response to the latest U.S. peace framework was unacceptable and accused Tehran of refusing to compromise on key demands.

According to reports, Iran demanded:

Trump rejected those conditions outright.

He compared the ceasefire to a critically ill patient with “a 1% chance of living,” signaling that Washington believes negotiations are nearing collapse.

At the same time, fighting has not fully stopped despite the ceasefire technically remaining in place.

Recent clashes reportedly included:

That’s where the situation starts to shift.

The ceasefire is no longer failing quietly — both sides are now publicly preparing for the possibility of renewed confrontation.

This is where the situation becomes more serious.

The biggest issue now is the Strait of Hormuz.

Iran has continued restricting movement through the strategic waterway, while the U.S. has maintained naval pressure in the region. Washington previously warned that keeping the strait partially closed would violate the terms of the ceasefire.

If negotiations collapse completely, energy markets could face another major shock.

A prolonged disruption in Hormuz would affect global fuel prices, shipping costs, inflation, and supply chains — especially in Asia and Europe.

And unlike previous regional flare-ups, this conflict is directly tied to global energy infrastructure.

Now the real question is:

Will diplomacy survive long enough to prevent another escalation?

This crisis is becoming larger than a traditional ceasefire dispute.

The U.S., Iran, Israel, Gulf states, and major global powers are all increasingly tied to the outcome. China is also expected to become more involved diplomatically because of its dependence on Middle Eastern energy supplies.

What makes this situation different from past U.S.-Iran confrontations is the scale of economic risk tied to global shipping routes and oil exports.

Even limited military incidents are now affecting worldwide markets within hours.

If tensions continue rising, governments could face increasing pressure over fuel costs, inflation, and economic instability.

Here’s what this could mean:

That’s where the risk increases.

Negotiators reach a temporary compromise, keeping the ceasefire alive while talks continue behind closed doors.

Military operations resume at a larger scale, causing major disruption to global oil flows and regional security.

This isn’t just about a ceasefire between the United States and Iran.

It’s about control of one of the world’s most important energy corridors — and whether global powers can prevent a wider regional crisis before markets and military tensions spiral further.

Watch for any announcement involving the Strait of Hormuz or renewed U.S.-Iran negotiations.

That could determine what happens next.