Oil prices continued to surge on Monday, triggering a stark sell-off across some of the world’s leading stock markets amid growing concern that the US-Israel war on Iran could set the stage for a global economic shock.The Middle East conflict has sparked an energy supply crisis that could risk driving up inflation and interest rates, according to economists, who believe growth is set to weaken while prices rise.Fears of stagflation – where economic activity stagnates, but inflation increases – loom large.Here’s what you need to know.The price of key oil benchmarks had already posted their highest weekly gains in six years by the time markets opened on Monday – when they soared to more than US$115 a barrel , surpassing $100 for the first time since Russia’s 2022 invasion of Ukraine.

The West Texas Intermediate (WTI) benchmark price for US crude is now nearly double its January level of about $60 a barrel.Oil prices climbed significantly in the first week of the US-Israel war on Iran after Iran in effect closed the strait of Hormuz.About a fifth of global oil and seaborne gas tankers typically pass through the strait, making it one of the world’s most important trade arteries.Oil production cuts across the Middle East in recent days have exacerbated fears of a supply shortage.The lengthening conflict has eroded the chance of prices resetting, according to Warren Hogan, economic adviser at Judo Bank.

“There’s a good chance that we’re seeing one of the most sudden increases in the cost of oil to the global economy ever,” Hogan said.Gas and fertiliser supplies have also been hit, driving up costs and increasing the risk of a significant global energy price spike, adding to inflation and slowing economic activity.While Donald Trump has played this down as a “short term” consequence of the conflict, investors appear unpersuaded.Shares across Asia fell sharply, with European and US markets expected to follow.Japan’s Nikkei fell over 6% and South Korea’s Kospi over 7% on Monday.

The US war on Iran is widely expected to boost inflation across the world, with a sustained rise in oil prices rippling through the wider economy.US inflation will surge to 3.7% if oil prices hold at $100 a barrel, according to Royal Bank of Canada (RBC) economists.Americans filling up their cars can already feel the impact: US fuel prices rose 25 cents over the week, and picked up another 25 cents over the weekend, averaging $3.44 a gallon by Sunday night, according to Gas Buddy.

Higher fuel costs drain workers’ wallets and add to business costs in other ways, pushing up the price of goods from food to furniture.Inflation is also set to pick up across the UK and eurozone if higher oil prices persist, according to Oxford Economics.Europe, which imports the vast majority of its oil and gas, saw natural gas prices rise nearly 67% in the war’s first week, according to analysts at ANZ Bank.China’s producer prices will meanwhile rise 0.4 percentage points if oil prices stay high, ANZ Bank has projected.

In Australia, inflation is set to approach 5% – close to 1 percentage point higher than pre-war predictions – economists say.Petrol prices could rise by a dollar a litre, Westpac economists warned, with costs already A$0.20 a litre higher than in February.“There’s going to be a severe and sudden short-term impact on Australian consumers’ cost of living, and their perceptions of their cost of living, i.e.

, their inflation expectations,” Hogan said.Oil price spikes are “stagflationary”: they slow down, or stagnate, economic activity, raising the risk of recession, while adding to inflation.World economic growth would weather a 10% lift in energy prices, according to the International Monetary Fund, but slow from about 3.2% to 3%.The UK and the euro area would each grow by just 1% or less, if the conflict persists, economists predict.

Asian economies have enjoyed strong growth in industrial production, powered by the global tech boom, but an energy shock could disrupt that momentum, risking stagflation, Oxford Economics has warned.In the US, oil prices of $125 a barrel could cut gross domestic product by 0.8% even as inflation surpasses 4%, according to RSM, a middle-market assurance, tax and consulting firm.The oil shock resembles those seen in the 1970s, when conflict in the Middle East resulted in surging prices and dragged advanced economies into persistent slumps, according to David Bassanese, chief economist at BetaShares.“If oil does stay above $100 a barrel and this disruption continues, then we may face a stagflationary moment in the first half of the year: weak growth, but central banks unable to do much about it because of the high level of inflation,” he said.

Interest rates are less likely to fall if the war drags on, according to economists, while central banks ready to hike will move sooner.The European Central Bank and Bank of Canada had been expected to leave rates on hold in 2026 before the strikes began.By Monday morning, both were expected to hike rates at least once in the next year.Before the war, the US Federal Reserve – under significant pressure from Trump to bring down rates – and the Bank of England had been expected to cut rates twice in 2026.Now the Fed is expected to cut only in September, and the Bank of England expected to hold them steady throughout the year.

Australia is now expected to face two rate hikes this year, when just one had been priced in before the conflict.The world is likely to face slower growth and higher prices, even if Trump ends the war, because oil prices will not return to their lows of January, Bassanese said.Traders will charge a premium to cover the risk of a renewed “on-again, off-again” conflict, he suggested.Countries across Asia, which is particularly reliant on oil from the Middle East, are already scrambling to mitigate the impact of the extraordinary rise in prices.In Bangladesh, universities will be closed from Monday, bringing forward the Eid al-Fitr holidays, as part of emergency measures to conserve electricity.

South Korean president Lee Jae Myung also announced the country’s first move to cap domestic fuel prices in almost three decades,A quick de-escalation would help the world avoid an inflation spiral, as oil prices would stabilise, according to the National Australia Bank’s chief economist, Sally Auld,While she said it seemed unlikely the conflict would endure for another month, if it did, there would be “material risk of global recession” and oil prices could hold near US$120 a barrel,A month-long disruption could even see prices surpass the all-time record high of US$145 a barrel, Goldman Sachs has estimated,Three months of disruption would see prices rise to US$185 per barrel, with severe consequences for the global economy, Westpac economists predict.