Oil Shock, Dollar Shock: Why Asia’s Currency Crisis Is a Eurodollar Story

When oil prices surge, most people think about gas prices and inflation. But there’s a second crisis that unfolds quietly in the background — one that doesn’t make front pages but matters just as much to the global economy. It’s a dollar crisis. And right now, countries across Asia are living through one in real time.

Taiwan just burned through nearly $9 billion in foreign reserves in a single month — the largest drawdown in 15 years. Indonesia set a record low for its currency. India’s rupee hit levels not seen in decades. None of this is coincidence. It’s the eurodollar system (US dollars held and traded in banks outside the United States) doing exactly what it always does when oil prices spike: it tightens up, and countries that depend on imported energy get squeezed.

Why Oil Prices Create Dollar Shortages

Here’s the chain reaction, step by step.

Most of the world buys oil in US dollars. When oil prices rise sharply — as they did during the recent Iran conflict, pushing crude toward $115–$140 per barrel at its peak — oil-importing nations suddenly need far more dollars than they normally would. They need those dollars fast, and they need them continuously.

The problem is that dollars used in international trade don’t come from the US Federal Reserve. They come from the eurodollar system — a vast, largely invisible web of dollar-denominated lending that happens between banks, corporations, and governments worldwide, completely outside US borders. When stress hits — war, sanctions, a spike in oil — the banks and financial institutions that supply those eurodollars get cautious. They tighten lending. They demand better collateral. They roll over fewer short-term loans.

So at the exact moment demand for dollars spikes, supply contracts. That’s the dollar shock.

What Happened in Taiwan, Indonesia, and India

Taiwan: $8.6 Billion Gone in One Month

Taiwan’s central bank confirmed that its foreign exchange reserves (the stockpile of dollars and other currencies a country holds as a financial cushion) fell by $8.6 billion in March alone — the steepest monthly drop in nearly 15 years. The central bank intervened aggressively in currency markets, selling dollar-denominated assets like US Treasuries to pump dollars into the local financial system.

Here’s what the media often gets wrong: when a central bank “sells dollars to defend its currency,” it isn’t dumping dollars out of frustration with the US. It’s acting as an emergency supplier. Local businesses and banks needed dollars to pay for oil — and couldn’t get enough from the eurodollar market — so the government stepped in to fill the gap.

The Taiwan dollar still fell sharply anyway. Which means the dollar shortage was bigger than the central bank’s entire intervention effort. That’s a significant signal.

Indonesia: Record Lows and Capital Controls

Indonesia’s rupiah (its local currency) hit a record low of 17,150 to the US dollar — worse than levels seen during the 1997-98 Asian Financial Crisis. The central bank burned through $3.7 billion in reserves in March alone, with $8.3 billion gone just in the first quarter of 2025.

To slow the bleeding, Indonesia imposed capital controls — restrictions on how much foreign currency residents can buy or transfer out of the country. Cash purchases of foreign currency were capped at $50,000 per buyer per month, down from $100,000. Even with the ceasefire news, the rupiah barely moved. Everything was going for the currency and it still couldn’t gain meaningful ground.

India: Two Decades of Structural Pressure

India’s situation is the most instructive, because it’s been playing out for nearly 20 years. The rupee has been in a long, grinding decline since 2007 — no coincidence that’s when the first eurodollar crisis erupted.

The reason is structural. India runs a large merchandise trade deficit (it imports far more than it exports, measured in goods). Every import has to be paid for in dollars. Those dollars come primarily from short-term eurodollar borrowing by Indian banks and businesses — loans that must be constantly rolled over, or renewed. When global dollar conditions tighten, that rollover becomes harder, more expensive, or impossible. The rupee falls.

The Reserve Bank of India has intervened repeatedly and aggressively. The rupee falls anyway — down roughly 7% over the past year, nearly hitting 95 to the dollar at the end of March. Central bank pledges to “contain excessive volatility” make for good press releases. They don’t change the underlying plumbing.

Contrast this with China, which runs a massive trade surplus (it exports far more than it imports). China earns dollars by selling goods globally. It doesn’t need to borrow them. That’s why even though China imports huge amounts of oil, the yuan has held up — and even strengthened — during the same period the rupee and rupiah were collapsing.

The Ceasefire Helps, But Doesn’t Fix the System

A ceasefire between the US and Iran was brokered recently, and oil dropped roughly $20 per barrel on the news — from the high $110s toward the low $90s. That’s genuinely good news. Markets rallied hard. Bond yields fell.

But with crude still sitting around $95 per barrel — well above the $50s where it was trading just months ago — the dollar demand pressure doesn’t simply vanish. Oil-importing nations across Asia still need more dollars than usual to pay their energy bills. The eurodollar supply side is still cautious.

And roughly 800 ships remain stuck in the Persian Gulf as of the ceasefire announcement. Getting global oil flows fully normalized will take time, even if the political situation holds. Maritime operators are right to be cautious: a ceasefire “may create transit opportunities, but does not yet provide full maritime certainty.”

What This Tells Us About the Eurodollar System

This isn’t a new story. When Japan’s banks had trouble rolling over eurodollar funding loans in 1963, the Japanese government sold US Treasury bills to plug the gap. The same mechanical relationship is playing out today across Asia, just at a much larger scale.

The eurodollar system is the backbone of global trade finance. When it works smoothly, it’s invisible. When it tightens — whether because of an oil shock, a war, a financial crisis — it shows up in currency exchange rates, reserve drawdowns, and central bank emergency interventions.

The lesson from Taiwan, Indonesia, and India is this: the fragility was already there before the oil shock hit. These currencies were already under pressure. The energy shock in March just made it impossible to ignore.

A ceasefire buys time. It doesn’t repair the underlying structure. Until oil prices fully normalize and eurodollar supply loosens, the monetary pressure across Asia will keep building — quietly, mechanically, and largely out of sight.