Dollar's Resurgence Fueled by Energy Dynamics, Not Safe-Haven Rush, After Iran Strikes
By Mike Dolan
LONDON, March 3 (Reuters) - The U.S. dollar's sharp rally in the wake of military strikes against Iran has sparked talk of a return to its classic role as a port in a geopolitical storm. A closer look at the market mechanics, however, suggests the greenback's strength is less about investors flocking to safety and more about a grim calculus of relative economic pain from soaring energy prices.
The dollar's haven credentials have been tarnished in recent years, particularly since the return of Donald Trump to the White House. Policy uncertainty and domestic political friction have seen the currency weaken even during bouts of market anxiety, as foreign investors, already heavily exposed to U.S. assets, have grown wary.
Yet the currency jumped across the board after U.S. and Israeli forces targeted Iranian sites over the weekend, an operation that included the assassination of Supreme Leader Ali Khamenei and triggered regional retaliation. The move was notable not for a surge in dollar demand itself, but for a wholesale exit from currencies of economies most vulnerable to an extended oil and gas price shock.
Default, Not Demand
With the United States now a net energy exporter, the initial 10% spike in crude prices poses a far greater threat to major importers. This dynamic left traditional havens like the Japanese yen floundering; it fell over 1% as markets priced in Japan's massive import bill and reliance on Hormuz Strait shipments. China's yuan, recently resilient, dropped 0.8%, pressured by its dependence on sanctioned Iranian crude now in limbo.
"This isn’t a friendly outcome for the Northern Asian currencies," said Kit Juckes, a currency strategist at Societe Generale. "The critical signal from the administration is that this operation will be measured in weeks, not days, prolonging the supply uncertainty."
Europe faces a compounded crisis with attacks on shipping effectively closing the Hormuz route, a vital channel for LNG and crude. Benchmark European gas prices soared 35% on Monday, prompting emergency EU talks. While the U.S. supplied most of Europe's LNG last year, the loss of Qatari supplies after Iranian attacks tightens the market further, helping push the euro to a one-month low.
Growth and Inflation Trade-Off
Barclays economists estimate every sustained $10 per barrel rise in oil shaves up to 0.2 percentage points off global growth. While Brent's $5 jump on Monday is a modest blow, forecasts of $100-plus barrels loom. For the U.S., the calculus shifts to inflation: with core prices still above 3%, persistent energy costs could argue for keeping interest rates higher for longer—a further pillar of dollar strength.
"The initial market reaction is all about mapping energy exposure," said Sarah Chen, a portfolio manager at Horizon Capital in Singapore. "It's a brutal relative performance game, not a flight to quality. The dollar wins by default because its economy is least wounded in this specific scenario."
Duration is key. President Trump has indicated a campaign lasting weeks, and prediction markets see a high chance of a pause by month's end. But Barclays' rule of thumb warns of a feedback loop: every $10 oil rise could lift the dollar 0.5-1.0%, which in turn exacerbates the energy shock for others, potentially pushing the currency higher still.
Market Voices
"This is a textbook 'least-worst option' trade," said David Miller, an independent forex analyst in London. "The dollar isn't strong; everyone else is weak on energy. It's a distasteful but rational shift that could persist if the conflict drags on."
"It's outrageous," fired back Elena Rossi, a veteran trader at a Milan-based bank. "Markets are rewarding the architect of this volatility! The dollar's gain is a direct tax on the rest of the world's stability. This isn't finance; it's geopolitical arbitrage with devastating human costs being ignored."
"The structural shift here is profound," noted Arjun Patel, Chief Economist at Global Insight Consultancy. "If geopolitical events consistently translate into dollar strength via the energy channel, it reinforces its dominance in a way pure safe-haven demand never could. Central banks outside the U.S. will be drafting contingency plans as we speak."
"I'm adjusting commodity hedges, not currency positions," said Li Wei, a fund manager in Shanghai. "The yuan and yen moves are a symptom, not the disease. The disease is supply disruption. Until there's clarity on shipping lanes, selling energy-importer currencies is the only hedge."
(The opinions expressed here are those of the author, a columnist for Reuters.)