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By Uche Usim
The United States dollar rose to a one-week peak against major global currencies on Monday, as renewed geopolitical tensions between Washington and Tehran unsettled investor confidence and weakened expectations of diplomatic progress in the Middle East.
According to Reuters, market sentiment turned cautious over the weekend following reports that the United States seized an Iranian cargo vessel, a move that further escalated already fragile relations between both countries. The development triggered a fresh wave of risk aversion across global financial markets.
Investors responded by shifting funds into traditional safe-haven assets, with the dollar benefiting from the flight to safety despite broader monthly fluctuations. The escalation has also dampened optimism around potential peace negotiations, adding further uncertainty to global economic outlooks.
Currency movements reflect cautious sentiment
The dollar initially strengthened against a basket of major currencies before giving up part of its gains as trading progressed, reflecting mixed investor positioning in response to evolving geopolitical risks.
The Australian dollar fell by 0.3 percent to $0.7145, highlighting weakening risk appetite in commodity-linked currencies. Meanwhile, the Japanese yen eased to 158.96 per dollar, although it remained below the critical 160 threshold that could prompt possible intervention by Japanese authorities.
These movements highlight a broader atmosphere of caution in global markets, where traders are balancing geopolitical concerns with shifting monetary expectations across major economies.
Escalating US–Iran tensions drive volatility
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The latest dollar rally was largely driven by heightened tensions between the United States and Iran. Washington confirmed the seizure of an Iranian cargo ship allegedly attempting to evade sanctions enforcement, further straining diplomatic relations.
In response, Tehran issued warnings of potential retaliation and indicated it would not participate in a scheduled second round of talks with the United States. The breakdown in negotiations comes just ahead of the expiration of a two-week ceasefire window, raising fears of renewed instability in the region.
Pressure also felt in Nigeria’s FX market
Nigeria’s foreign exchange market also reflected mild pressure, as the naira weakened slightly amid broader global uncertainty and softening reserves.
The naira closed at N1,342.5 per dollar on Friday, compared with N1,341.01 the previous day. Nigeria’s external reserves also declined to $48.65 billion as of April 16, 2026, down from $48.72 billion earlier in the week and $48.81 billion the week before.
Market analysts say the combined effect of global risk sentiment and domestic FX dynamics continues to expose the naira to external shocks, even as authorities maintain efforts to stabilise the market.
Reports also suggest that parallel market volatility remains influenced by speculation, arbitrage, and fiscal leakages, which continue to outpace optimism in the official window.
The Central Bank of Nigeria (CBN) had earlier projected a relatively stable outlook for external reserves, despite recent fluctuations in global capital flows.
