The 10-year yield spike above 5% on Monday is the first time US borrowing costs have touched that level since October 2023, and it is happening for a reason forex traders cannot ignore: oil. Brent crude surged past $108.5 a barrel, a 3.7% jump on the day, after Houthi attacks forced Saudi Arabia to close a key east-west pipeline and seize the strategic island of Perim in the Bab al-Mandab strait. A war-driven energy shock and a steeper Treasury curve are now the dominant force in currency markets, worth separating from what it means for specific pairs.
What Happened: Oil, the Bond Sell-Off, and the 10-Year Yield Spike
The benchmark US 10-year Treasury yield has climbed steadily from a low this year of 4% before the US-Israeli war on Iran broke out in late February, and Monday’s move to 5% came alongside a broad sell-off across Wall Street. Yemen’s Iran-aligned Houthi forces launched fresh attacks on Saudi infrastructure over the weekend, and Gulf states postponed a meeting with Tehran on opening a temporary shipping lane through the strait of Hormuz, a route that normally carries a fifth of the world’s oil and gas supply. Saudi traders have warned the kingdom could run out of exportable oil stocks within days if the pipeline does not reopen.
It is not just US yields moving. UK 30-year gilt yields rose to their highest level since March 1998, and UK gas prices climbed 5% to 208.73p a therm, the highest since December 2022. The 10-year yield spike is therefore a global bond story as much as a US one, and it lands two days before the Federal Reserve’s Wednesday decision and the Bank of England’s Thursday meeting, with markets pricing a Fed move and a BoE hold. For more on how the strait itself is being priced by currency desks, see Hormuz Oil Shock Currencies: What Traders Need to Watch Now.
Which Currency Pairs Are Moving and Why
Higher US yields normally support the dollar by widening the rate advantage over other major currencies, but the driver matters as much as the direction. When yields rise because growth is strong, the dollar tends to benefit outright. When they rise because oil-driven inflation is forcing central banks into a corner while growth risk builds, the reaction is messier, and that is the setup now.
USD/JPY is the pair to watch first. Japan imports almost all of its energy, so a jump in oil toward $108 a barrel worsens its terms of trade just as the 10-year yield spike widens the US-Japan rate gap, a double pressure point for the yen.
EUR/USD is caught between two forces: a eurozone that is also an energy importer facing higher gas costs, and a European Central Bank that already raised rates last week, ahead of both the Fed and the BoE. The euro’s resilience depends on whether traders read that move as proactive inflation control or as playing catch-up, a distinction explored in EU Energy Shock Resilience Is Rewriting the Euro’s Risk Premium.
Commodity-linked currencies, particularly the Canadian dollar and Norwegian krone, tend to gain some support from higher oil prices as net exporters, though that can be tempered by broader risk-off flows. Sterling faces its own cross-current, with the 30-year gilt yield surge to a 1998 high raising UK borrowing costs even as the Bank of England is expected to hold rates on Thursday.
Who Benefits and Who Loses
The clearest losers are net oil importers with limited policy flexibility. Japan, the eurozone, and emerging markets that import crude are all absorbing higher energy bills at the same time as global borrowing costs rise, squeezing both the current account and the fiscal side at once. Saudi Arabia is a complicated case too: it is seeing higher prices for the oil it can still export, but its own production was already at the lowest level since 1990 in August, and the pipeline closure now threatens the volumes it can actually sell.
Net oil exporters with spare capacity, and their currencies, are the more straightforward beneficiaries, though that can be tempered if risk-off flows dominate. On the fixed income side, holders of cash or short-duration instruments benefit as yields rise, while holders of long-duration bonds face further mark-to-market losses, part of why the bond sell-off keeps intensifying.
The US itself is a mixed case. Higher yields raise the government’s own borrowing costs at a politically sensitive moment, and Donald Trump has already pushed back on the idea that domestic fuel price rises are linked to the Iran war rather than the separate conflict in Europe. Whether the dollar benefits from the 10-year yield spike depends on whether investors treat it as a genuine rate-advantage story or as a symptom of inflation risk that erodes real returns, a distinction discussed in Dollar Weakness Risk Premium: Why This Yield Rally Won’t Save the Greenback.
Risks to This View
The biggest risk to any dollar-bullish read of the 10-year yield spike is that it stops being read as a rate story and starts being read as a stagflation story. If the Fed hikes specifically to fight oil-driven inflation while growth expectations deteriorate, the dollar’s yield advantage can be overwhelmed by concerns about US growth and fiscal sustainability, especially with 30-year yields already at multi-decade highs in the UK.
A second risk is de-escalation. Brent fell back over the summer once a ceasefire looked plausible, before this month’s renewed hostilities pushed it back above $100 a barrel. Any credible move to reopen the Saudi pipeline or calm the Bab al-Mandab situation could unwind both the oil and yield spikes quickly. A further move toward the spring peak of $126 a barrel is plausible if disruption spreads, but so is a sharp reversal if diplomacy makes progress, a dynamic already flagged in Saudi Oil Bypass Risk Rattles Forex Markets After Pipeline Strike.
A third risk is central bank divergence. The Fed’s Wednesday decision and the BoE’s Thursday hold are both live, and any deviation from what is priced would move the rate differentials doing most of the work in USD/JPY and EUR/USD. Traders should also watch for further logistical disruption, since the Saudi warning about running out of exportable stock within days suggests the physical oil market, not just the futures price, could be the next flashpoint.
What Traders Should Watch This Week
The next few sessions carry three catalysts: the Wednesday Fed decision, the Thursday Bank of England meeting, and any headlines out of Saudi Arabia on the pipeline or the Bab al-Mandab strait. Each can reinforce or unwind the current 10-year yield spike, and with it, the direction of USD/JPY, EUR/USD, and sterling crosses. Given how fast this has moved, from a low of 4% before the Iran war to 5% now, and from $72 prewar oil to a brief $126 peak and back toward $108, positioning for a single direction rather than tracking the underlying drivers looks risky.
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This article is market analysis and commentary, not financial advice.
I’m Vinit Makol. With 20+ years in forex and financial markets, I serve as lead analyst at Edge-Forex, covering currency markets, macroeconomics, trading strategies, and market-moving events to give traders practical insights they can actually use.