US and Iran exchanged fire in the Strait of Hormuz, testing a fragile ceasefire. Japan real wages rose 1.0% but services PMI hit 11-month low. Next: Trump remarks Friday 1600 GMT.
The fragile US-Iran ceasefire faced its most serious test yet after the two sides exchanged fire in and around the Strait of Hormuz, with Iranian forces launching missiles, drones, and small boats at three US Navy destroyers and the US responding with strikes on Bandar Abbas and Qeshm Island. The immediate market reaction was a bid for safety that lifted the yen and the dollar, but the moves were contained, and crude oil gave back early gains. The simple read – geopolitical flare-up equals risk-off – misses the more complex transmission now unfolding across rates, trade policy, and currency intervention.
A US official insisted the exchanges did not constitute an act of war and that the ceasefire remained in effect, a framing that markets initially took at face value. Trump later described the strikes as a "love tap," a characterisation that sat awkwardly alongside Centcom's description of self-defence strikes against missile and drone launch sites, command and control infrastructure, and surveillance nodes. The breadth of the target set suggested something more purposeful than a tap, light or otherwise. Trump subsequently told ABC that ceasefire negotiations with Iran are continuing, and that Pakistan has asked Washington not to pursue something called "Project Freedom" while those talks are ongoing, a detail that raises rather more questions than it answers. The president is scheduled to deliver remarks at noon Friday, 1600 GMT, on a subject the White House did not see fit to disclose in advance.
Crude tracked in a limited range, rising early but giving it back, as the market assessed whether the exchange was a one-off or the start of a broader escalation. The Strait of Hormuz is the world's most important oil chokepoint, and any disruption there would send energy prices sharply higher, but the absence of a sustained bid suggested traders were not yet pricing a supply shock. In currencies, the yen and dollar attracted the usual safe-haven flows, but the yen's move was overshadowed by a staggering intervention figure. Reuters cited yen intervention over six days, April 30 to May 6, of US$67 billion. That is not a typo. The Ministry of Finance's aggressive defence of the yen, even as geopolitical tensions might normally support the currency, tells you that Tokyo is fighting a structural weak-yen trend driven by the rate gap with the US. The better read: the yen's safe-haven bid is being actively managed, and the intervention line in the sand is now a key level for traders.
Japan provided two data points that told a coherent if uncomfortable story for the Bank of Japan. Real wages rose 1.0% in March for a third straight month, exactly what the BOJ needed to see ahead of its June rate decision. The same war that rattled the Strait of Hormuz was meanwhile making itself felt in Japan's services sector, where the April PMI slipped to an 11-month low of 51.0, input costs hit a 42-month high driven explicitly by Middle East fuel prices, and business confidence sank to its lowest since the pandemic. The BOJ wants to hike. The data is giving it permission and a warning at the same time. For the yen, the transmission is straightforward: a June hike would narrow the rate differential with the US and support the currency, but if services weakness spills into broader consumption, the BOJ may be forced to delay, leaving the yen exposed to further intervention rather than fundamental support.
Away from the Gulf, trade policy delivered its own dose of uncertainty. A US court struck down Trump's 10% global tariffs in a 2-1 ruling, finding them unjustified under a 1970s trade law. Goldman Sachs (Alpha Score 56, Moderate) promptly told clients not to get too excited, expecting an appeal before May 12 and a higher court stay that would keep the duties alive until their scheduled July 24 expiry, with replacement tariffs likely waiting in the wings regardless. Meanwhile Trump gave the EU until July 4 to implement the Turnberry trade deal or face higher tariffs, offering a temporary reprieve on car duties after a call with European Commission President Ursula von der Leyen. The message to Brussels: the clock is running. For EUR/USD, the tariff deadline adds a layer of political risk that will keep the pair pinned near recent lows until there is clarity. The Trump tariff deadline is now the dominant driver for the euro, overshadowing the usual rate differentials.
Reform UK had a night to remember in the UK local elections, gaining more than 90 seats as Labour shed over 70 and the Conservatives lost more than 20. The result will accelerate the conversation about Keir Starmer's position and, as Commerzbank noted earlier in the week, may yet add sterling to the list of things the market needs to worry about. GBP/USD has been trading on the Bank of England's rate path and broader risk appetite, but a political shock could introduce a risk premium that the pair has not priced. The transmission from local elections to currency markets is rarely direct, but when the incumbent government loses significant ground, the uncertainty tends to weigh on the currency through the investment channel.
South Korea reported a record current-account surplus of $37.3 billion in March, its 35th consecutive monthly surplus, with semiconductor exports rising nearly 150% and total goods exports hitting an all-time high of $94.3 billion. Chip demand, it turns out, is indifferent to geopolitical mood music, but the won remains at the mercy of the broader risk environment. The love tap heard around the Strait of Hormuz will set the tone for the weekend. Trump's remarks at 1600 GMT Friday are the next concrete catalyst, and any hint of escalation or, conversely, a diplomatic off-ramp will drive the Monday open. The dollar's bid on geopolitical tension is fragile, and the ceasefire, however tested, is still technically in place. The market is pricing a contained conflict, but the $67 billion yen intervention shows that when the macro picture shifts, the moves can be violent and fast.
AI-drafted from named sources and checked against AlphaScala publishing rules before release. Direct quotes must match source text, low-information tables are removed, and thinner or higher-risk stories can be held for manual review.