1 week ago
40
The British pound slid to $1.3474 on September 14, its weakest reading against the US dollar since August 7. The 0.4% daily drop wasn’t driven by anything happening in London. It was driven by what happened roughly 3,000 miles southeast, in the oil fields of Saudi Arabia.
Houthi strikes on Saudi Arabian infrastructure forced the closure of the Kingdom’s main pipeline that bypasses the Strait of Hormuz, one of the most strategically important chokepoints for global energy supplies. Brent crude jumped 3% to $108 per barrel in response, and the dollar did what the dollar tends to do when the world gets nervous: it went up.
Why oil moved the currency needle
Oil is priced in dollars globally, so when crude surges, demand for dollars rises mechanically as importers need more of them to pay their bills. Layer on top of that the dollar’s traditional role as a safe-haven currency during geopolitical flare-ups, and you get a one-two punch that smaller currencies struggle to absorb.
The pound was particularly vulnerable. Britain is a net energy importer, which means higher oil prices directly worsen its trade balance. More expensive energy imports mean more pounds flowing out and more dollars flowing in, applying downward pressure on sterling through the basic mechanics of supply and demand.
At $108 per barrel, Brent is trading at levels that make central bankers uncomfortable. Elevated energy costs feed into consumer prices, complicate inflation forecasts, and narrow the range of policy options available to institutions like the Bank of England. For a country already dealing with multi-decade-high bond yields, the timing is less than ideal.
Diverging central bank paths
The currency move also reflects a growing gap in interest rate expectations between the Federal Reserve and the Bank of England. Markets are now pricing in a higher likelihood that the Fed will hike rates around September 16, a move that would widen the yield differential between dollar and pound assets.
The Bank of England, by contrast, is widely expected to hold its current rates. That divergence matters because capital tends to flow toward higher-yielding currencies. If the Fed raises while the BoE stands pat, dollar-denominated assets become relatively more attractive, pulling investment away from sterling.
The European Central Bank has already moved, implementing recent rate increases that have further complicated the global monetary policy picture.
Analysts at Commerzbank have flagged what they see as a mismatch between market expectations and reality. They suggest that markets may be overestimating the pace of future UK rate hikes, which, if true, means the pound could have further to fall as traders recalibrate their positions.
UK growth offers a mixed signal
UK GDP growth for July came in at 0.4%, a number that beat forecasts of essentially flat output. But multi-decade-high British bond yields are signaling that the government’s borrowing costs remain punishingly elevated. Higher yields on gilts reflect investor concerns about fiscal sustainability, inflation persistence, or both. A single month of decent GDP growth doesn’t resolve those structural questions.
The pound’s inability to rally on the GDP beat suggests that traders are focused on the energy shock, rate differentials, and geopolitical risk rather than backward-looking growth data.
The Strait of Hormuz remains a flashpoint. Roughly one-fifth of the world’s oil supply passes through that narrow waterway, and the pipeline closures in Saudi Arabia have temporarily removed a critical bypass route.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
English (US) ·