Iran blocks the Strait of Hormuz: fragile ceasefire collapses — oil markets on the brink of shock
June 20, 2026. The Khatam al-Anbiya Central Command — Iran's highest joint headquarters — has officially announced the closure of the Strait of Hormuz to shipping. The reason? Alleged gross violations of the recently signed Islamabad Memorandum by the United States and Israel. This decision instantly dashed hopes for de-escalation and once again pushed global energy markets to the brink of collapse.
This move is not just harsh rhetoric. It is a direct and immediate action that nullifies all the positive signals observed just a few days ago. Recall that approximately 21 million barrels of oil and petroleum products are transported through the Strait of Hormuz daily — that's about 20% of global liquid hydrocarbon consumption and a quarter of all seaborne oil trade. The figures from the U.S. Energy Information Administration (EIA) leave no room for speculation: any disruption in this artery is a direct blow to global supply chains.
The Islamabad Memorandum: An Agreement That Didn't Last a Week
Just three days ago, on June 17, after tense negotiations, a 14-point memorandum was agreed upon. The document stipulated that Iran would make maximum efforts to ensure safe and free passage for commercial vessels during the first 60 days. In return, the U.S. was to lift the naval blockade of Iranian ports. Markets reacted instantly: oil prices dropped, and Bitcoin even showed a short-term upward impulse amid a reduction in the geopolitical risk premium.
However, as we see, the truce turned out to be a fiction. The Iranian side claims that the ongoing actions of Israel in Lebanon, as well as what they perceive as Washington's failure to meet its commitments, render the memorandum invalid. The military warns that the closure of the strait is only a "first step," and if aggression continues, further, harsher measures will follow.
Markets in Confusion: No Official Confirmation Yet
Here lies a key point of uncertainty. Despite Tehran's loud statements, there is still no official confirmation of a full blockade of the strait from independent sources. U.S. Vice President JD Vance, in a recent speech, indicated the exact opposite — he spoke of a long-term strategy to neutralize Iran's nuclear ambitions through aggressive negotiations and strict inspections. This creates a classic "who can shout louder" situation.
My analysis: The market, which priced in a "peace scenario" after the memorandum was signed, is now in a zone of extreme risk. If the information about the strait's closure is confirmed, we will see a sharp spike in oil prices, which will instantly impact all risky assets, including cryptocurrencies. In the short term, this is a classic "risk-off" — a flight to the dollar and gold. However, if Iran is bluffing, we will witness a powerful rebound. Keep an eye on official statements from Washington and Tehran — they will determine the direction of capital flows in the next 48 hours.