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Oil prices jumped back above $100 a barrel and global stocks fell after weekend talks between the US and Iran ended without an agreement and Donald Trump imposed a blockade of the Strait of Hormuz. The US president announced the blockade on Sunday, targeting Iranian vessels and ships that have paid a toll to Iran for passage through the strait, in an attempt to choke off the flow of Iranian oil.US Central Command said it would start at 10am ET (5.30pm in Iran and 3pm in the UK), blocking all Iranian Gulf ports and coastal areas, in effect seizing control of maritime traffic in the Strait of Hormuz. The news drove oil and gas prices sharply higher again, after the two-week ceasefire between the US and Iran announced on Wednesday prompted a sharp fall in energy prices, and crude ended the week below the psychological $100 a barrel threshold.Brent crude rose by nearly 7% to $101.74 a barrel on Monday morning, while US crude is up more than 8% to $104.69 a barrel. Gas prices also increased, with the British wholesale gas contract for May soaring by 11.7% to 122.5p a therm. Analysts at JPMorgan Chase said last week they expected oil prices to stay high in the second quarter, above $100 a barrel, before easing in the second half of the year.Most Asian stock markets fell on Monday, with Japan’s Nikkei down 0.7% and Hong Kong’s Hang Seng index losing 1%, while Chinese stocks rose slightly. Sentiment was helped by Beijing’s announcement of a 10-initiative strategy aimed at deepening ties with Taiwan. European stocks also fell, led by airlines including Lufthansa, Wizz Air, easyJet and British Airways parent IAG. The FTSE 100 index in London lost 0.4%, dropping 45 points to 10,555. Germany’s Dax fell 1%, Italy’s FTSE MiB slipped 0.7% and Spain’s Ibex was down 1.1%. With oil and gas prices rising sharply higher, energy companies such as BP and Shell are rallying.Priyanka Sachdeva, senior market analyst at the broker Phillip Nova, said: “In today’s environment, every barrel of risk added to oil markets carries an inflation price tag for the global economy.” She added: “The market reaction underscores a simple but powerful reality: Hormuz risk is not theoretical; it is structural, and it is real.”Interest rate expectations have shifted again; investors now see an 84% chance of two rate increases from the Bank of England this year to tackle rising inflation, up from 60% on Friday. Before the Iran war, the central bank was expected to cut rates. The price of gold fell 0.4% to $4,730.75 an ounce as the blockade fuelled inflation concerns, prompting traders to scale back expectations for Federal Reserve rate cuts this year.

The ongoing US-Israel war on Iran has taken a critical turn with Donald Trump's announcement that the US Navy would start blockading the Strait of Hormuz. This strategic waterway is crucial for global oil shipments, and any disruption could have significant economic impacts. In response, Iran's Revolutionary Guard warned that approaching military vessels to the strait would be considered a violation of the ceasefire. This development has led to a surge in oil prices, with US crude oil rising 8% to $104.24 a barrel and Brent crude oil increasing 7% to $102.29. The blockade, set to begin on Monday morning, will be implemented by US Central Command (Centcom) and will affect all maritime traffic entering and exiting Iranian ports. This move is part of a broader strategy that may include resuming limited military strikes in Iran, according to reports. The situation has drawn international attention, with Australian Prime Minister Anthony Albanese stating that his government has not been asked to participate in the blockade and is keen on continuing negotiations between the US and Iran. Meanwhile, Iranian parliamentary speaker Mohammad Bagher Ghalibaf dismissed Trump's threats, asserting that they would have no effect on the Iranian nation.

The US has announced plans to blockade the Strait of Hormuz, a vital waterway through which about 20% of global oil passes. This move comes after ceasefire talks with Iran ended without an agreement over the weekend. The blockade, threatened by President Donald Trump, aims to pressure Iran into reopening the strait, which has been effectively closed since February 28. Trump's announcement on social media stated that the US Navy will begin the process of blockading any and all ships trying to enter or leave the Strait of Hormuz. He accused Iran of 'WORLD EXTORTION' and threatened that any person who attacked US vessels would be 'BLOWN TO HELL!' However, the blockade's scope appears to have been scaled down, with US Central Command (Centcom) stating it would be confined to vessels transiting through Iranian ports, permitting passage of ships headed to ports belonging to America's Gulf allies. The blockade is set to come into effect at 10am ET (2pm GMT). The UK will not be involved in any blockade of the strait, and Australian Prime Minister Anthony Albanese has stated that his country was not asked to participate. Oil prices have surged following Trump's announcement, with US crude increasing 8% to $104.24 a barrel and Brent crude oil rising 7% to $102.29. Experts warn that the blockade could lead to higher oil prices, but much depends on its 'scope and implementation.' The managing director of research at ClearView Energy Partners, Kevin Book, noted that leaner volumes generally mean tighter markets and higher prices. Iranian and/or Houthi reprisals against Gulf producers' alternative routes could drive prices still higher. The blockade could cut off one of the Iranian regime's major sources of funding but might also have a short-term negative effect on global prices. About 100 tankers have transited the strait since the US and Israel started bombing Iran, most carrying Iranian oil products bound for China and India. Iran's Revolutionary Guards have stated that any warships approaching the strait to enforce a blockade would be considered in breach of the current ceasefire and would be dealt with strongly. Trump floated the possibility of a resumption of US strikes inside Iran, citing missile factories as one possible target.

The ongoing conflict in Iran has created a perilous situation where the threat of nuclear war and climate disruption have converged into a single, catastrophic crisis. This crisis will persist long after the war subsides, emphasizing the need for immediate and decisive action. For over a decade, climate change has been recognized not just as an environmental issue but as a fundamental threat to national and global security. The current situation demands that governments conduct thorough risk assessments and treat climate change with the same urgency as military threats. The war on Iran has several alarming features: Unilateral action: The US and Israel launched a large-scale war against a sovereign nation without consulting major allies, creating a diplomatically isolated conflict with no clear exit strategy. Escalation threats: There are credible threats of escalation from both sides, with Donald Trump issuing ultimatums and Iran threatening to target critical infrastructure. Catastrophic miscalculation: The conditions for miscalculation are ripe, with erratic leadership, intelligence failures, and extreme pressure on decision-makers. The conflict has significant implications: Global energy shock: The closure of the Strait of Hormuz has caused an acute global energy shock, with higher oil prices likely to accelerate inflation and economic instability. Climate impact: The war is consuming military resources and political attention, with no climate dividend, and may pressure countries to extend fossil fuel use. Australia, as a regional power and signatory to the NPT, has responsibilities to the international order. The author, Admiral Chris Barrie, calls on the Australian government to take four key steps: Conduct and release a nuclear escalation risk assessment. Use diplomatic channels to counsel restraint. Refuse any form of complicity in nuclear use. Champion de-escalation at the NPT review conference. Australia can play a crucial role in addressing these threats by acting on evidence, speaking plainly about risks, and leading rather than following events.

President Donald Trump declared that the U.S. Navy will commence a blockade of the Strait of Hormuz immediately after peace talks between Washington and Tehran in Pakistan ended without an agreement. In a social‑media post, Trump labeled Iran’s actions as “extortion” and warned that American warships would hunt down and interdict any ship that has paid Iran a toll to traverse the waterway, while also beginning mine‑clearing operations. Iran’s Revolutionary Guard responded that civilian vessels may still cross the strait under “specific regulations,” but any military craft attempting entry would be deemed a breach of the cease‑fire and would be “dealt with severely.” Since the February 28 war launched by the United States and Israel, Iran has effectively taken control of the strategic chokepoint, a route that carries about 20% of the world’s oil and liquefied natural gas shipments. Traffic has now dwindled to a trickle, sending shockwaves through the global economy and raising alarm among Gulf Cooperation Council (GCC) states. Al Jazeera correspondents noted that the rhetoric from the White House has amplified “alarm bells” across the GCC, where leaders had hoped the two‑week ceasefire would evolve into a longer‑term peace framework. Oman’s foreign minister, Badr Albusaidi, urged on social media that the ceasefire be extended and that all parties make “painful concessions” to avoid a return to war. Trump’s statements also included a stark threat: any Iranian forces that fire on U.S. or “peaceful” vessels would be “blown to hell.” He claimed the blockade would involve “other countries” and that the United Kingdom, along with “a couple of other nations,” were dispatching minesweeper vessels to assist – a claim the British government has not confirmed. Domestic criticism emerged quickly. Democratic Senator Mark Warner told CNN he “doesn’t see how blockading the strait will compel Iran to open it,” questioning the strategic logic behind the move. Iran denied U.S. allegations that two of its warships had recently passed through the strait for mine‑clearing, warning that any military vessel attempting such a passage would meet a “strong response.” Tehran officials have floated the idea of instituting a post‑conflict toll system for vessels using the waterway, a prospect that could further entrench Iran’s leverage over global energy flows. Analysts warn that heightened tensions in the Hormuz corridor could push oil prices higher, amplifying inflationary pressures worldwide. As the situation unfolds, mediators continue to press both sides to resume diplomatic talks and avoid a broader escalation.

Day 44 of the US‑Iran war ended without a peace deal as a marathon 21‑hour session in Islamabad collapsed, jeopardising the fragile cease‑fire that has held since the conflict began over six weeks ago.Vice President JD Vance, leading the US delegation, told reporters that the lack of an agreement was "bad news for Iran much more than it’s bad news for the United States of America," before departing Pakistan.Pakistan’s Foreign Minister Ishaq Dar pledged that Islamabad would continue to facilitate dialogue between the two longtime adversaries.In Iran, officials downplayed expectations, noting that no one anticipated a settlement in a single session. State‑run IRIB quoted ministry spokesperson Esmaeil Baghaei saying the talks were never expected to conclude quickly. Meanwhile, Tehran residents expressed a mix of scepticism and hope after weeks of air attacks that have left a nation of 93 million people reeling; more than 2,000 Iranians have been killed in the US‑Israel‑Iran conflict.In the United States, Vance reiterated that the delegation left with a "final and best offer" for Iran, emphasizing that Washington had communicated its position repeatedly during the talks. He cited multiple conversations with President Donald Trump, Secretary of State Marco Rubio, Treasury Secretary Scott Bessent, and Central Command head Brad Cooper. Trump, however, maintained that the US had already "won" on the battlefield by eliminating Iranian leaders and key infrastructure, stating that a deal would not alter the outcome.The US military reported that two destroyers transited the Strait of Hormuz ahead of planned mine‑clearing operations – a first since hostilities began – though Iran’s state media claimed the joint command denied the movement.Academic David Des Roches of the Thayer Marshall Institute told Al Jazeera that while Washington clarified its stance, it did not shift its core demand: preventing Iran from acquiring a nuclear weapon.In Lebanon, Israel continued strikes, claiming to have hit a "loaded and ready‑to‑launch rocket launcher" in Jouaiya, southern Lebanon. Protests have erupted in Beirut against any direct Israel‑Lebanon negotiations. The Lebanese Ministry of Public Health reported at least 2,020 deaths and 6,436 injuries from Israeli attacks since March 2.In Israel, Channel 12 reported that a drone launched from Lebanon triggered sirens in the Upper Galilee before being intercepted.The stalemate has kept global oil and gas prices soaring, underscoring the broader economic ripple effects of a war that shows no sign of abating.

President Donald Trump declared that the United States will commence a naval blockade of the strategic Strait of Hormuz in response to the breakdown of peace talks between Washington and Tehran held in Islamabad.In addition to the blockade, Trump warned that American forces could target Iran’s water‑treatment plants, power stations and bridges unless Tehran abandons its pursuit of a nuclear weapons capability.The announcement came after a 21‑hour round of direct negotiations between the two sides collapsed on Sunday morning, ending a brief cease‑fire that had been brokered by the United States, Israel and Iran.U.S. Vice‑President JD Vance, who led the American delegation, said Iran refused to renounce the possibility of developing nuclear weapons, while Iranian officials accused Washington of failing to earn their trust.Trump instructed the U.S. Navy to begin “blockading any and all ships trying to enter or leave the Strait of Hormuz” starting Monday at 10 a.m. ET (14:00 GMT). He also accused Iran of “extortion” for charging tolls to tankers and announced a de‑mining operation in the waterway’s central sector, although the exact number of mines remains unclear.The Iranian Revolutionary Guard warned that any warships enforcing the blockade would be deemed a breach of the cease‑fire and would be met with a strong response, insisting the strait remains under Iranian control.Two U.S. destroyers transited the strait on Saturday without incident, a move the Pentagon described as the start of a mine‑clearance mission, even as Iranian media claimed the vessels were threatened as they departed.Financial markets reacted sharply: U.S. crude oil jumped 8% to $104.24 per barrel and Brent crude rose 7% to $102.29, reflecting concerns that the blockade could disrupt the flow of roughly 100 tankers that have been paying up to $2 million each for passage.Vance reiterated that the United States seeks a clear, affirmative commitment from Iran not to pursue a nuclear weapon, describing it as the “core goal of the president.”Iranian parliament speaker Mohammad Bagher Ghalibaf argued that Tehran offered “constructive initiatives,” but U.S. demands were “excessive” and hindered an agreement, according to the semi‑official Tasnim news agency.Pakistani mediators urged both parties to avoid renewed hostilities and pledged to arrange fresh talks, emphasizing the importance of upholding the existing cease‑fire.In a televised interview, Trump warned that if a deal cannot be reached, the United States may resume bombing Iran, specifically targeting its water‑supply infrastructure, desalination plants and power generation facilities.Regional fallout continued: at least 11 people were killed in southern Lebanon amid a series of Israeli strikes, while Pope Francis called for an immediate cease‑fire, expressing solidarity with the Lebanese people.The broader conflict, now six weeks old, has claimed more than 3,000 lives in Iran, over 2,000 in Lebanon, dozens in Israel and several Gulf states, and has inflicted extensive damage on critical infrastructure across the Middle East.

Two planes of Iranian negotiators, many from the Islamic Revolutionary Guard Corps, arrived in Pakistan to confront a 21‑hour deadline for talks that span two decades of nuclear tension and new strategic concerns such as control of the Strait of Hormuz and U.S. compensation for past attacks.The United States responded with a delegation that included Vice‑President JD Vance and roughly 300 officials, signaling a recognition that Iran’s seasoned team—featuring figures like Ali Bagheri Kani and former chief negotiator Abbas Araghchi—was well‑prepared.During the marathon, Vance held multiple conversations with former President Donald Trump and, notably, with Israeli Prime Minister Benjamin Netanyahu. Iranian officials claimed the Netanyahu call hardened the U.S. stance, underscoring the delicate diplomatic balance.Veteran negotiators Robert Malley and Aaron David Miller warned that the time frame was either too long for a mere reiteration of rejected demands or far too short for genuine negotiation, highlighting a strategic misreading of Tehran’s position.Vance concluded the session by presenting what he described as a “best and final offer,” leaving the door open for further dialogue pending Iranian acceptance.Meanwhile, President Donald Trump signaled an intention to impose a blockade of the Strait of Hormuz—a move that could inflate global oil prices and further destabilize the region.Iran’s objectives included drafting a memorandum of understanding to extend a tentative ceasefire and address three core issues: an end to Israel’s offensive in Lebanon, a governance framework for Hormuz shipping, and the disposition of its highly enriched uranium stockpile, whether through UN‑supervised down‑blending or export to a third party.Vance emphasized the need for an affirmative Iranian commitment not to pursue a nuclear weapon or the rapid pathways to one, a demand that intersects with ongoing debates about Iran’s sovereign right to enrich uranium—a capability currently null after recent U.S. strikes.In practice, Iran is already exercising selective control over Hormuz traffic, allowing 2 million barrels of Iraqi oil and 4 million barrels of Saudi oil to pass, a tactic described by an Iranian parliamentarian as a “continuous atomic bomb” that provides strategic depth.Beyond the diplomatic impasse, Iran confronts severe domestic challenges: hyperinflation approaching triple‑digit levels, an internet blackout threatening economic activity, and a political climate marked by assassination threats. These pressures compound the difficulty of achieving a sustainable peace settlement.

The collapse of talks between the US and Iran has sent shockwaves through global markets, fuelling fears of a prolonged energy crisis and rising inflation. The failure to reach a peace deal has left large numbers of oil tankers stuck in the Persian Gulf, with oil prices fluctuating wildly in response to the uncertainty.US Vice-President JD Vance has blamed the collapse of the talks on Tehran's refusal to abandon its nuclear weapons programme, while Iranian sources have hit back at what they describe as 'excessive' demands from Washington. The stalemate has raised concerns about the long-term impact on the global economy, with governments and central banks warning of higher inflation and interest rates.Mohamed El-Erian, an adviser to Allianz, has cautioned that uncertainty will continue to dominate assessments of the financial impact from the conflict. 'Absent a swift resumption of negotiations, the immediate reaction of financial markets when they open for the trading week will be to push oil prices higher and borrowing costs higher,' he said.The International Monetary Fund and World Bank's spring meetings in Washington will focus on the war's impact on the global economy, with the IMF's managing director, Kristalina Georgieva, indicating that the fund will present three scenarios predicting lower economic growth and higher inflation. The IMF is also expected to highlight the impact on vulnerable economies.In the short term, oil prices have ended the week lower, with Brent crude at $94.26 a barrel and West Texas Intermediate crude at $95.63 a barrel. However, global stock markets have rebounded after a temporary ceasefire was announced, with the S&P; 500 close to its level before the US-Israeli attacks on Iran began.