Geopolitical Risks Set to Override FX Seasonal Patterns in March 2026
Escalating military conflict between Iran and a US Israeli coalition has upended foreign exchange markets at the start of March, rendering the historically flat seasonal tendencies for major currency pairs largely irrelevant. Shipping traffic through the Strait of Hormuz , the chokepoint for more than 10% of the world's crude oil supply, has dropped approximately 70% after the Iranian navy warned commercial vessels away from the waterway, sending WTI crude to a seven month closing high and driving safe haven flows into the Swiss franc , the strongest G10 currency of the past week [1][2][3]. The US Dollar Index (DXY) sits at 97.85 , having broken below the closely watched 98.68 pivot, while speculative net short positioning against the dollar has reached its most extreme level since March 2021. The confluence of geopolitical risk, shifting rate expectations, and a weakening greenback has created a trading environment in which macro catalysts are likely to dwarf the seasonal averages that normally guide March positioning [1][2]. Seasonal Baselines vs. Geopolitical Reality March has historically been one of the quieter months for major currency pairs. Data stretching back to the collapse of the Bretton Woods system in 1971 shows that most G10 pairs tend to drift within narrow bands during the month, offering little directional conviction from seasonality alone [1]. | Currency Pair | March Seasonal Average (since 1971) | | | | | EUR/USD | +0.0% | | GBP/USD | +0.2% | | USD/JPY | +0.1% | | AUD/USD | 0.1% | | USD/CAD | 0.1% | Those averages, however, assume a baseline level of geopolitical stability that no longer holds. EUR/USD recorded some of its smallest monthly ranges in years during February, with total movement contained to fewer than 190 pips, but the eruption of hostilities in the Persian Gulf has injected volatility that could push March well outside its typical band [1][2]. The Iran Escalation The immediate catalyst is a series of US Israeli military strikes that killed several of Iran's most senior military and political figures, including the Chief of Staff , the Head of the Revolutionary Guards , Ayatollah Khamenei , and a senior advisory figure. Iran has responded with retaliatory attacks targeting Israel and US allied Gulf states, while its naval forces have moved to restrict commercial shipping through the Strait of Hormuz [2][3]. The crude oil market has reacted sharply. WTI broke a six month high and closed near its seven month peak, reflecting fears that a sustained disruption to Hormuz traffic could remove a meaningful share of global supply from the market. Signs that OPEC has reached a preliminary agreement with the Trump administration to increase production have provided only partial relief, as traders weigh the possibility that Iranian backed disruptions could offset any additional barrels [2][3]. The safe haven trade has been textbook: the Swiss franc led all major currencies over the past week, while the Japanese yen , despite its traditional haven status, was the weakest performer, a divergence that reflects Japan's energy import dependency and the yen's vulnerability to crude price spikes [2]. Dollar Dynamics and Fed Pricing The dollar's decline below the 98.68 DXY pivot has coincided with a recalibration of Federal Reserve rate expectations. The fed funds rate stands at 3.50 3.75% , and markets are now pricing two quarter point cuts for the remainder of 2026, down from three cuts priced just one week earlier [1][3]. | Indicator | Value | | | | | DXY | 97.85 | | Fed funds rate | 3.50 3.75% | | Rate cuts priced (2026) | 2 x 0.25% | | US PPI (MoM) | +0.5% (vs. +0.3% expected) | | NFP forecast (March 6) | +195,000 | | VIX | 18.4 | The hawkish surprise in the latest US PPI reading, which came in at +0.5% month over month against expectations of +0.3%, has complicated the rate cut narrative. Persistent wholesale inflation makes it harder for the Fed to justify easing even as the geopolitical backdrop argues for accommodative policy. Friday's nonfarm payrolls report, with a consensus forecast of +195,000 jobs, looms as a binary event for dollar denominated assets, including commodities and emerging market currencies [1][3]. Key Pairs to Watch GBP/USD traders are focused on the year to date low of 1.3340 as a critical support level. A breach would signal that the pound's resilience against the dollar in early 2026 has exhausted itself, potentially opening the door to a retest of levels not seen since late 2025 [1]. AUD/USD presents one of the more compelling technical setups. The pair recently tested 3.5 year highs near 0.7150 , and Commitment of Traders (COT) data shows bullish speculative positioning at multi year extremes. That crowded long trade makes the Australian dollar vulnerable to a sharp unwind if risk sentiment deteriorates further, but it also reflects genuine macro support from elevated commodity prices and resilient Chinese demand for Australian exports [1][2]. Gold closed at the high of both the day and the week, while silver ended above $93 per ounce , reinforcing the broader flight to hard assets. The precious metals bid is running in parallel with the currency safe haven flows, and both are likely to persist as long as the Hormuz situation remains unresolved [2][3]. The Week Ahead Beyond nonfarm payrolls, the calendar includes ISM Manufacturing , ISM Services , and Average Hourly Earnings data, each capable of shifting the rate cut calculus. But the dominant variable remains the Persian Gulf conflict. Currency markets have historically shown that geopolitical shocks can compress months of seasonal drift into days of directional movement, and the current crisis carries the scale to do exactly that. Traders relying on March's traditionally quiet seasonal profile are likely to find that historical averages offer little shelter when tanker traffic through the world's most critical oil chokepoint has fallen by more than two thirds [1][2][3]. References [1] h…