Macro Insights Weekly: Cost of the Iran war
Iran deal hopes may calm markets briefly, but war-driven energy, shipping, and defence costs will keep inflation and fiscal pressures high, sustaining bond market stress and favouring short-duration b...
Group Research - Econs, ----Select-----25 May 2026
  • An imminent deal may help sentiment, but war costs will continue to build.
  • Energy infrastructure damage to keep oil and gas costs elevated for longer.
  • Strait of Hormuz risk raises shipping volatility and energy premiums.
  • Higher defence spending adds to already stretched public finances.
  • Rising yields and refinancing risks favour short-duration bond strategies.
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COMMENTARY: Cost of the war

An Iran deal may be around the corner, but the cost of the war will likely continue to accumulate in the coming months. The most obvious cost is inflation, which won’t dissipate even with an expeditious re-opening of the Strait of Hormuz. Oil/gas production/refining facilities in the region have been affected substantially, which will continue to constraint the supply of petroleum products. Regardless of the contour of the deal, we think perceptions regarding the shipping of products through the Strait have shifted fundamentally, and a degree of volatility around safe passage would persist. Globally, nations would diversify energy suppliers and build larger strategic reserves, all adding to the cost of energy for years to come.

Then there is fiscal. The war has led to profound questions not just about energy security, but also about the reliability of ostensible allies to protect national security. Defence spending will likely rise as countries look to secure their backyards further.

The bond market is not taking these developments kindly. Public sector debt burdens have been on an uptrend through this decade, fuelled by global responses to the pandemic. Global government debt as a share of GDP has risen from a pre-pandemic level of 82% to 94% by end-25, with the IMF forecasting 100% by 2029. Public debt interest payment alone is heading toward 3% of global GDP presently.

These figures, already uncomfortable, are now looking particularly disconcerting as there is no visible sign of fiscal consolidation among the large indebted economies around the world, with the ongoing crisis making the task of taming debt even more onerous. Debt market selloff is unsurprising, with the mountain of long-duration papers up for refinancing for years to come.

Bond yields of major EM and DM economies have risen through this year, with two notable exceptions. Among high income economies, Singapore’s debt yield has in fact rallied; among EM economies, the same holds for China. But for the rest, there has been little respite from servicing an ever more expensive public debt burden. An announcement of an Iran deal may buoy markets, but only marginally, in our view. This war’s bills have to be paid for a while by most governments. With respect to investment strategy, that leaves us only with short-duration bond strategies.

Click here to read the full report.

 

Taimur Baig, Ph.D.

Chief Economist - Global
[email protected]

 

 


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