The yen warning

The yen’s slide back to 160 against the dollar may look like a Japanese problem.

Tokyo certainly thinks it is. Officials are once again warning of intervention, traders are watching every comment from the Bank of Japan and markets are asking how much further policymakers are willing to tolerate currency weakness. Yet the more interesting question is whether the yen is merely the first visible crack in a much broader story unfolding across Asia.

Three months into the US-Israeli war on Iran, investors remain focused on oil prices, ceasefire rumours and diplomatic headlines. Fair enough. Oil remains the most immediate transmission mechanism. But has the real fault line now shifted from the commodity market to the currency market?

The relationship is straightforward enough. Higher oil prices worsen the terms of trade for energy-importing economies.

A stronger dollar compounds the problem by raising the local-currency cost of those imports. Inflation pressures rise, current-account balances deteriorate and central banks find themselves forced into increasingly uncomfortable decisions. Japan offers perhaps the clearest illustration because the process is happening in real time.

The dollar tends to strengthen during periods of heightened geopolitical uncertainty. The war has repeatedly reinforced that dynamic. At the same time, Japan remains heavily dependent on imported energy.

As oil prices rise, the yen comes under pressure. That pressure has now become severe enough to revive intervention fears, with authorities once again signalling their readiness to act if market moves become disorderly.

Yet Japan is hardly alone. India, Indonesia, Thailand, the Philippines and South Korea all depend heavily on imported energy. Their circumstances differ, but the underlying vulnerability is similar. Every increase in oil prices effectively acts as an external tax on economic activity.

Every surge in the dollar amplifies the burden. The question is not whether policymakers notice the problem. The question is whether they possess enough room to offset it.

The irony is that oil itself has recently offered a measure of reassurance. Prices have retreated from their highs whenever reports emerge of progress in negotiations between Washington and Tehran. Markets continue to respond enthusiastically to each suggestion that a deal may be close. But what exactly are traders pricing?

The physical market appears less convinced than the futures market. Inventories continue to fall. Strategic reserves continue to be drawn down. Governments and producers have spent months cushioning the shock through emergency stockpiles, operational flexibility and industrial adjustments. Those measures have worked remarkably well. Yet they have also consumed the very buffers designed to absorb disruptions.

That raises an uncomfortable question. Are markets becoming overly reliant on inventories in the same way they have become reliant on diplomatic headlines?

Commodity markets have avoided a far more violent repricing largely because inventories have filled the gap between disrupted supply and ongoing demand. Yet inventories represent time rather than production.

Every barrel released today is one that cannot be released tomorrow. Every stockpile drawdown reduces the system’s capacity to absorb future shocks. At what point do markets begin focusing less on ceasefire rumours and more on the arithmetic of declining buffers?

The answer matters because demand destruction has already begun appearing across parts of the global economy. Consumers are driving less. Airlines are adjusting routes. Businesses are looking for efficiencies.

China has seen a notable decline in oil demand as electrification accelerates and consumers adapt to higher fuel costs. Similar trends are emerging elsewhere. Demand destruction has helped keep prices from rising even further, but it carries its own economic consequences.

There is another layer to this story. If inventories continue falling while demand destruction becomes the primary mechanism keeping prices contained, what happens when economic growth begins slowing at the same time? Policymakers would then face the familiar challenge of weaker growth combined with stubborn inflation pressures.

Markets spent much of 2025 assuming that inflation had largely been defeated. Has the war reopened that debate?

This is where the currency market becomes particularly revealing. Exchange rates aggregate multiple risks simultaneously. Growth expectations, inflation pressures, interest-rate differentials and capital flows all converge in one price. The yen’s weakness therefore reflects more than oil. It reflects broader concerns about how economies absorb persistent external shocks.

For Pakistan, the implications should feel familiar. The country remains vulnerable to both higher oil prices and a stronger dollar. Energy imports become more expensive. External financing conditions tighten. Inflationary pressures intensify.

Pakistan is hardly unique in that respect. Much of emerging Asia faces variations of the same challenge. The difference is that some economies possess larger reserves, stronger fiscal positions or more flexible policy frameworks than others.

Perhaps the recent decline in oil prices proves justified. Perhaps negotiations eventually produce a durable settlement. Perhaps inventories stabilise before reaching critically low levels. Markets are clearly willing to assign a meaningful probability to that outcome.

But what if they are wrong? What if the more important signal is not the latest move in crude futures but the growing strain visible in currencies across energy-importing Asia? And if Japan is already discussing intervention at 160, what might policymakers elsewhere be quietly worrying about?

The oil market triggered the initial shock. But the currency market increasingly looks like the place where Asia is counting the cost.

Copyright Business Recorder, 2026