The Horizon: Geopolitical Economic Uncertainty
Signals | 18 April 2026. More talks expected after the US enforces blockade; a darker outlook for the global economy; system insights, and recommended great reads
The Horizon is a strategic briefing that tracks the political, economic, and business signals reshaping the international system, and how they impact strategy, leadership, and wealth, every Saturday morning (CET).
In this edition: Key signals of the week; system insights; what I am reading; and one last thing.
Key Signals
More Talks Expected After US Enforces Blockade on Iranian Ports Amid Hormuz Crisis
This week, the United States military said it had activated a targeted blockade of Iranian ports and coastal waters, a dramatic escalation in the almost 2-month old US-Israel conflict with Iran, which began on February 28.
The move came after inconclusive peace talks in Islamabad last week.
Vice President JD Vance, who led the US delegation, said the negotiations failed because Iran would not provide an “affirmative commitment” that it would not seek a nuclear weapon or the tools to achieve one quickly.
Oil prices rose sharply after the US military said it would implement a shipping blockade.
On Friday, Iran’s Foreign Minister, Seyed Abbas Araghchi, said “the passage for all commercial vessels through Strait of Hormuz is declared completely open for the remaining period of ceasefire, on the coordinated route”, after an Israel-Lebanon cease-fire agreement.
Oil prices dropped significantly, and stock markets in the US and Europe rose.
However, President Trump said the US blockade would continue.
In response, Iran’s top negotiator and parliament speaker, Mohammad Bagher Ghalibaf, said that “with the continuation of the blockade, the Strait of Hormuz will not remain open”.
Meanwhile, it was reported by Axios that the U.S. and Iran were negotiating over a three-page plan to end the war. According to their sources, the U.S. was considering a $20 billion cash-for-uranium deal with Iran.
New peace talks are reported to be possible for this weekend.
Why this matters: The Strait of Hormuz is the world’s single most important energy chokepoint. The IEA had recently described the impact of the disruption to oil and gas flows through the Strait as "the greatest threat to global energy security in history".
About 20% of global oil supplies and significant LNG volumes passed through the waterway before the conflict began.
With the current ceasefire nearing its end, the clock ticked in a very literal sense for global energy markets.
However, the prospect of new peace talks opens up the possibility of an extension to the ceasefire or a final agreement to end the conflict.
Key details:
The blockade took effect on Monday, 13 April at 10 a.m. ET.
It will not impede freedom of navigation for vessels transiting the Strait of Hormuz to and from non-Iranian ports, according to the US Central Command.
Iran’s military warned that no port in the Persian Gulf or the Sea of Oman would remain secure if Iranian ports are targeted, according to Iranian Press TV.
This US move countered Iran’s initial closure of the Strait since late February, and its tollbooth scheme, which reportedly charged some shipping companies a $2 million fee to guarantee safe passage.