The British Pound (GBP) experienced notable volatility on Tuesday, driven by escalating geopolitical tensions between the United States and Iran, which have led to rising oil prices and impacted global market sentiment. Against the Japanese Yen (JPY), GBP traded with a mild upside bias, with GBP/JPY hovering near one-week highs around 211.60 as of the latest update [1]. The Yen remained on the defensive due to Japan's vulnerability as a major net energy importer, with higher oil prices increasing the country's import bill and trade deficits. Japan’s Finance Minister Katayama stated that authorities are monitoring all scenarios regarding oil stockpiles and the Middle East situation, and will respond accordingly [1].
Meanwhile, the Pound Sterling gave back early gains against the US Dollar (USD), with GBP/USD flattening around 1.3240 during the European session as market sentiment turned risk-averse following Iran's denial of a temporary ceasefire proposal to the US [2]. A senior Iranian official emphasized that Tehran seeks a permanent ceasefire, reopening of the Strait of Hormuz, guarantees against further aggression, and compensation for damages [2]. US President Donald Trump set a deadline of 8:00 p.m. Eastern Time on Tuesday for Iran to comply, threatening to target Iranian energy and civilian infrastructure if no agreement is reached [1][2].
Market reactions reflected heightened risk aversion: S&P 500 futures traded 0.35% lower below 6,600, and the US Dollar Index (DXY) stabilized around 100.00 after clawing back earlier losses [2]. In currency markets, the Japanese Yen was the strongest against the Swiss Franc, while its performance against other majors was mixed [1].
On the economic data front, the UK's S&P Global Services PMI fell to 50.5 in March from 53.9 in February, marking its lowest level since April 2025 and coming in below the flash estimate of 51.2. The Composite PMI also declined to 50.3 from 53.7 [1]. In Japan, attention is on upcoming data releases, including February Labor Cash Earnings and the Current Account balance, due Wednesday [1].
Looking ahead, investors are awaiting US President Trump's response to Iran's stance and the release of the Federal Reserve Open Market Committee (FOMC) minutes from the March policy meeting, where the Fed left rates unchanged at 3.50%-3.75% and emphasized a non-preset policy approach [2]. In the UK, markets are pricing in up to two Bank of England rate hikes by year-end, while in Japan, higher inflation expectations may keep the Bank of Japan on a gradual tightening path, though elevated energy costs could limit further policy normalization [1].
CONCLUSION
Escalating US-Iran tensions and rising oil prices have driven volatility in GBP crosses, with GBP/JPY supported by interest rate differentials and GBP/USD pressured by risk aversion. Market participants are closely watching geopolitical developments and upcoming central bank communications for further direction.