Dollar Surges as Middle East Attacks Escalate and Strait of Hormuz Closes

The US dollar extended gains across the board on July 13, 2026, after a dramatic escalation in the Middle East saw fresh military strikes targeting shipping infrastructure in and around the Persian Gulf. The subsequent closure of the Strait of Hormuz — a critical chokepoint through which roughly 20% of the world's seaborne oil passes — triggered an immediate flight to safety in global markets. The dollar index (DXY) spiked sharply as risk appetite evaporated, oil prices surged, and equities sold off in tandem. For currency traders, this is a textbook geopolitical shock, but the depth and duration of the move will depend heavily on how quickly — or whether — the strait reopens.

The Fundamental Picture

At its core, a Hormuz closure is one of the most severe supply-chain disruptions the global economy can absorb, and markets are pricing that reality in fast. The strait channels crude from Saudi Arabia, Iraq, the UAE, Kuwait, and Iran to markets in Asia, Europe, and beyond. Any sustained blockade sends Brent crude prices sharply higher, which acts as a stagflationary tax on oil-importing economies — a dynamic that is fundamentally dollar-supportive in two reinforcing ways.

First, when global risk sentiment deteriorates violently, institutional money rotates into US Treasuries and the dollar as the world's primary reserve currency. Second, higher oil prices raise US inflation expectations, which keeps Federal Reserve rate-cut bets on the back burner. Markets had been pricing in one or two Fed cuts in the second half of 2026 before today's events; those expectations are now being rapidly repriced as traders reassess whether the Fed can ease into an inflationary energy shock. Sticky-higher rates for longer in the US widens the yield differential in the dollar's favour against currencies whose central banks — notably the ECB and Bank of England — have more room to cut.

The euro and the pound are doubly vulnerable here. Europe imports a substantial portion of its energy from the Gulf, meaning a Hormuz closure hits the eurozone economy more directly than it hits the US, which has become a net energy exporter. This asymmetric exposure makes EUR/USD and GBP/USD natural short candidates in a sustained escalation scenario. The Japanese yen, meanwhile, faces a complex trade-off: Japan is a major oil importer (yen-negative) but also a classic safe-haven currency (yen-positive). The net result tends to favour the dollar over the yen in acute geopolitical crises, though the divergence can be short-lived.

Commodity-linked currencies — the Canadian dollar, the Australian dollar, and the Norwegian krone — have a split reaction. Canada benefits from higher oil, so CAD can outperform other risk currencies even in a sell-off. AUD, which tracks broader risk appetite and Chinese demand, typically suffers more cleanly. These distinctions matter enormously for pair selection.

The Technical Picture

The DXY index broke above the key 104.50 resistance level that had capped rallies since early May 2026, printing intraday highs near 105.80 at the time of writing. A sustained daily close above 104.50 flips that zone to support and opens the technical pathway toward 107.00 — a level that attracted significant selling in Q1 2026 and where a cluster of Fibonacci retracements aligns.

• DXY support: 104.50 (former resistance, now pivotal), then 103.20 (200-day moving average zone)
• DXY resistance: 105.80 (today's spike high), then 107.00 (Q1 2026 swing high)

On EUR/USD, the pair broke below the 1.0820 support zone that bulls had defended for six weeks, with selling accelerating through 1.0780. The next significant support sits at 1.0700, and below that, the 1.0580 area from the March 2026 lows. Momentum indicators on the four-hour chart are deeply oversold, which could trigger technical bounces — but in a genuine risk-off event, oversold readings can persist or deepen before relief arrives.

USD/JPY is the most nuanced chart: the pair traded in the 151.50–153.00 range prior to the event and initially spiked toward 153.80 on dollar strength, but safe-haven yen buying has since capped gains. A clear break above 154.00 would suggest dollar demand is overwhelming yen safe-haven flows; a retreat below 151.00 would indicate the yen is winning the tug-of-war.

What It Means for Traders and Investors

Scenario planning is essential here because geopolitical events have binary outcomes that technical analysis alone cannot resolve.

• Bullish dollar / escalation scenario: If the Hormuz closure persists beyond 48–72 hours and diplomatic channels fail to produce a credible off-ramp, DXY above 104.50 on a closing basis keeps the bias bullish toward 107.00. EUR/USD shorts initiated below 1.0820 target 1.0700 then 1.0580. Intraday traders can sell EUR/USD rallies toward the 1.0820–1.0840 re-test zone with tight stops above 1.0870.
• Dollar pullback / de-escalation scenario: A ceasefire announcement or credible diplomatic progress could reverse the risk-off move sharply. DXY back below 104.50 would invalidate the breakout and expose a return toward 103.20. EUR/USD would recover toward 1.0900+. Swing traders should define risk clearly: holding dollar longs without a hard stop below 104.00 risks being caught in a whipsaw reversal.
• Long-term investors should note that geopolitical spikes in the dollar often mean-revert within weeks unless they coincide with a genuine structural shift in Fed policy. This is a tactical, not a structural, dollar story — for now.

Markets and Correlations to Watch

This event ripples across every major asset class, and the correlations are tight and fast-moving.

• Brent crude (BRN): The most direct reflection of Hormuz risk. A sustained close above $100/bbl would amplify the inflationary pressure narrative and keep dollar-bullish forces alive. Watch for potential supply releases from strategic reserves as a circuit-breaker.
• Gold (XAU/USD): A dual safe-haven and inflation hedge, gold surged alongside the dollar — a rare but not unprecedented co-movement. If gold sustains above $2,500/oz, it signals that inflation hedging is dominating the safe-haven dollar trade and adds upside pressure to both assets simultaneously.
• US 10-year Treasury yields: Watch for a yield spike driven by inflation re-pricing versus a yield drop from flight-to-safety buying. The net direction will be a crucial signal for USD momentum; yields rising = more dollar fuel.
• S&P 500 futures (ES): Equities sold off hard on the news. A sustained break below the 5,400 support zone in ES reinforces risk-off and keeps dollar demand elevated.
• USD/CAD: Canada's oil-exporting status creates a natural hedge. The pair may underperform (CAD stays relatively firm) compared to EUR/USD or AUD/USD shorts in a prolonged oil spike.
• Bitcoin (BTC/USD): Crypto initially sold off alongside equities, reflecting its current high correlation to risk assets rather than safe-haven status. Watch whether BTC decouples if the crisis deepens — it has not proven a reliable geopolitical hedge in 2026.

The Bottom Line

The Hormuz closure is the kind of shock that reshapes market positioning within hours, not days. The dollar's fundamental case is strong as long as the strait remains closed: safe-haven demand, repriced Fed cuts, and asymmetric energy pain for Europe all point higher. The key triggers to monitor are: the pace of diplomatic negotiations, any US or allied military response that could escalate or de-escalate the situation, and crude oil's ability to hold above $95/bbl. For the dollar, 104.50 on DXY is the line in the sand — bulls need that level to hold on a closing basis to keep the rally credible. If it does, 107.00 is the next destination. If diplomatic resolution arrives faster than the market currently prices, expect a sharp, painful reversal that punishes those who chased the spike. Position sizing and defined stops are non-negotiable in this environment.