Dr Shane Oliver | AMP
The past week provided welcome relief in the Iran War, with Trump delaying for two weeks his threat of the “complete demolition” of Iran’s power plants and bridges. So far, it's all very shaky, but whether the “ceasefire” holds or not and the War de-escalates or escalates from here, there will be significant long-term implications, beyond the near-term stagflationary impact that already looks likely this year. The long-term implications will mostly serve to reinforce existing trends towards deglobalisation, increased geopolitical risk, even bigger government and higher inflation pressures.
Trump’s decision to back down and announce a ceasefire was consistent with his pattern of making exorbitant demands then backing down as pressure grew intense. This time around, his poll support was collapsing, markets were threatening to riot, and he was in a no-win situation with Iran. It clearly has plenty more missiles and drones, and if he escalates, it would use them, worsening the global impact. While Trump has military superiority, Iran has weaponised the Strait of Hormuz to control global oil supplies. So, it is a sort of MAD - mutually assured destruction - standoff from which Trump ideally has to back down. Renewed US/Iran talks have failed to reach an agreement, with Trump declaring, “whether we make a deal or not makes no difference to me. And the reason is that we’ve won”. But then he announced a new contradiction – the US will itself block shipping in the Strait, but at the same time its Navy will begin demining it! Of course, he may soon say something completely different.
Overall, we lean towards the view that Trump will find a way to keep the ceasefire going, given the political pressure he is under, but uncertainty is high.
For now, the Strait remains the key, because the last ships that made it through at the end of February are now reaching their destinations, meaning refineries in Asia will soon start to run low on oil to refine. So the resultant 10-15% hit to global oil supply (after allowing for diversions, eg, via the Saudi East-West tunnel) will start to bite this month. All of which risks a renewed surge in oil prices, to maybe around $US150/barrel in order to curtail consumption, and plunging share markets.

Source: Bloomberg, AMP
The nascent pickup in the flow of shipping could resume. But if this comes with Iran and/or the US controlling the flow (with fees and vetos), it will be an unstable solution – as the rest of the world won’t accept such an outcome indefinitely, given the precedent it will set. This would point to a resumption of the conflict. Maybe after the midterms are over, when Trump is less politically constrained, or if his and the Republicans' polling gets so bad that he has nothing to lose by escalating again.
Even if there is a quick end to the war, it will take months for global oil flows to return to normal, given the time it will take to resume energy extraction in the Gulf (weeks & months for oil, years for some gas plants), to then load this onto ships and for those ships to arrive at refineries in Asia. And then for the refined products to reach Australia.
So, a near-term stagflationary impact of higher inflation and weaker growth is now baked in.
In Australia, we see inflation peaking at around 5-5.5% in the current quarter and GDP growth slowing to around 1.5% this year. With oil supplies coming to crunch time this month, the risk of recession in Australia is now high. For central banks wary of letting inflation expectations rise, the focus is likely to be initially on the boost to inflation rather than the hit to growth. This is the case in Australia, where inflation was already well above target, and signs of rising wage demands will worry the RBA. So, we are allowing for more RBA rate hikes this year.
Beyond the uncertain short-term stagflationary impact, the War will leave a longer-term impact on economies and markets in nine key ways.
It could also be evident in the upcoming Federal Budget in Australia, which is likely to see more “cost of living” help for households and businesses at the expense of commitments just a few months ago for the Budget to focus on savings in the level of spending and on productivity-enhancing reforms. Another year of stronger spending growth will add to concerns that it will never be brought back to more sustainable levels, as in 2027, the focus will return to the next election.
Ever-higher public debt and rising bond yields also run the risk of a public debt crisis at some point.

Source: IMF, AMP
There are three key implications for investors.
First, a somewhat less favourable economic outlook – if governments play an increasing role in the economies (via more defence spending, onshoring and protectionism), it’s likely to mean lower productivity resulting in slower economic growth and higher inflation. In short, lower living standards. In the US at present, it’s being fortuitously masked by the AI boom – but this could be a double-edged sword in the near term.
Second, the boost to geopolitical risk and reinforcement of populism and nationalism (notwithstanding the counter-trend election outcome in Hungary) means increased uncertainty, including for businesses.
Finally, all of which runs the risk of more constrained and volatile investment returns. Which should mean that shares offer a higher risk premium over bonds. But at present the risk premium offered by US and Australian shares – as measured by the forward earnings yield less 10-year bond yields - remains very low.

Source: Bloomberg, AMP
All prices and analysis at 13 April 2026. This document was originally published in Livewire Markets on 13 April 2026. This information has been prepared by AWM Services Pty Ltd (ABN 15 139 353 496)(AFSL No. 366121), part of the AMP GroupThe content is distributed by WealthHub Securities Limited (WSL) (ABN 83 089 718 249)(AFSL No. 230704). WSL is a Market Participant under the ASIC Market Integrity Rules and a wholly owned subsidiary of National Australia Bank Limited (ABN 12 004 044 937)(AFSL No. 230686) (NAB). NAB doesn’t guarantee its subsidiaries’ obligations or performance, or the products or services its subsidiaries offer. This material is intended to provide general advice only. It has been prepared without having regard to or taking into account any particular investor’s objectives, financial situation and/or needs. All investors should therefore consider the appropriateness of the advice, in light of their own objectives, financial situation and/or needs, before acting on the advice. Past performance is not a reliable indicator of future performance. Any comments, suggestions or views presented do not reflect the views of WSL and/or NAB. Subject to any terms implied by law and which cannot be excluded, neither WSL nor NAB shall be liable for any errors, omissions, defects or misrepresentations in the information or general advice including any third party sourced data (including by reasons of negligence, negligent misstatement or otherwise) or for any loss or damage (whether direct or indirect) suffered by persons who use or rely on the general advice or information. If any law prohibits the exclusion of such liability, WSL and NAB limit its liability to the re-supply of the information, provided that such limitation is permitted by law and is fair and reasonable. For more information, please click here.