Home loans have become more expensive in North America and Europe despite central banks keeping rates on hold

The war no one wanted is now costing people their homes — or at least the homes they planned to buy. Since US and Israeli forces launched strikes on Iran on 28 February 2026, the financial blast radius has extended well beyond oil tankers and stock exchanges. It has reached the mortgage desk at your local bank. Across North America and Europe, the cost of financing a home has climbed sharply, not because central banks have moved rates, but because bond markets have moved anyway. The Federal Reserve, the European Central Bank, and the Bank of England have all held their benchmark rates steady. It hasn’t mattered.

The Bond Market Doesn’t Wait for Central Bankers

There is a persistent misunderstanding in how most people think about borrowing costs. Central bank policy rates set the floor for overnight lending between banks. They do not, directly, set what a homebuyer pays for a 30-year mortgage. That rate is tethered to a different instrument: long-dated government bonds — specifically the 10-year Treasury note in the United States, or gilt yields in the United Kingdom. When investors grow nervous about inflation, they sell bonds. Prices fall. Yields rise. Mortgage rates follow.

Since the conflict began, that chain reaction has played out in near-textbook fashion. The 10-year US Treasury yield climbed to 4.595% on 16 May 2026, its highest level since early 2025. The 30-year Treasury bond yield pushed above 5.1%, a level not consistently seen since before the 2008 global financial crisis. In the United Kingdom, five-year gilt yields jumped roughly 19 basis points in a single trading session on 3 March, triggering emergency repricing at several mortgage lenders who had been preparing rate cuts that morning. In the eurozone, the 10-year GDP-weighted sovereign bond yield rose approximately 15 basis points in the weeks following the outbreak, closing the first review period at around 3.3%.

The driver in all three cases is the same: oil. The Strait of Hormuz, a narrow waterway through which roughly 20% of the world’s energy supply flowed before the war, has been effectively closed to commercial traffic since late February. Oil prices have surged more than 80% this year as a result. Brent crude touched $109 a barrel on 16 May; West Texas Intermediate hit $105. Those numbers don’t just affect petrol forecourts. They feed through into transport, logistics, household energy bills, and the price of manufactured goods — a broad-based inflation shock that bond investors price quickly, and that central bankers, constrained by competing obligations to growth, cannot easily offset with rate hikes.

Why Mortgage Costs Are Rising Despite Central Banks Holding Rates

Why are mortgage rates rising if central banks haven’t moved? Central banks control overnight lending rates, not long-term bond yields. Fixed-rate mortgages are priced off government bond yields and swap rates, which respond to inflation expectations rather than policy decisions. When oil prices spike and investors anticipate persistently higher inflation, they demand a higher yield to hold long-duration bonds — and mortgage rates rise in lockstep, regardless of what the Fed, ECB, or Bank of England decides.

The practical effect on American borrowers has been stark. The 30-year fixed mortgage rate jumped to 6.65% on 16 May, according to Mortgage News Daily data. Freddie Mac’s weekly survey, released on 7 May, put the same rate at 6.37% — the second consecutive weekly increase. Bankrate’s lender survey placed it at 6.46% on 13 May. In late February, before the conflict began, that rate had dipped just below 6%. In round terms, that’s a swing of more than 60 to 70 basis points in ten weeks.

The monthly arithmetic is punishing. Based on a 6.46% rate and the April 2026 median existing home price of $417,700, a buyer putting 20% down would pay roughly $2,103 per month in principal and interest — consuming about 24% of the median American family’s monthly pre-tax income. That’s before property tax, insurance, or maintenance. Housing economists no longer expect mortgage rates to fall below 6% in the near future, a revision that has upended what was supposed to be a recovery year for the US housing market.

The picture is more complicated for European borrowers, partly because fixed-rate structures there tend to be shorter-term — two- or five-year fixes rather than 30-year instruments. But the mechanism is similar. In the UK, swap rates and short-dated gilt yields rose sharply in early spring. “Pricing teams at mortgage lenders across the country are deep in discussions right now,” said Pete Dockar, chief commercial officer at UK lender Gen H, on 3 March. “This is a bit of a blow to the mortgage market because, for the first time in recent memory, buyers were feeling really optimistic.” Those discussions have since produced visible results: lenders including Coventry, Nationwide, and Virgin Money have adjusted rates upward since the conflict escalated.

An Inflation Shock with Structural Characteristics

Joel Kan, the Mortgage Bankers Association’s vice president and deputy chief economist, put the transmission mechanism plainly in early May: “The threat of higher-for-longer oil prices continued to keep Treasury yields elevated, and mortgage rates finished last week higher.” He added that higher mortgage rates, combined with affordability constraints and economic uncertainty, had pushed potential homebuyers to the sidelines.

What makes this particular inflation episode difficult to manage is its geographic origin. Energy price shocks stemming from geopolitical disruption don’t respond to domestic policy tools. The Fed cannot reopen the Strait of Hormuz. The ECB cannot persuade Iran to stand down. When inflation is driven by domestic wage growth or fiscal expansion, central banks have well-calibrated instruments. When it arrives via a closed waterway in the Persian Gulf, they face a different problem: tightening into a demand slowdown risks worsening a downturn; holding rates risks being perceived as indifferent to inflation anchoring.

The ECB’s governing council opted to hold its benchmark deposit facility rate at 2% at its April meeting, even as eurozone inflation jumped to 3% that month, driven largely by energy costs. ECB President Christine Lagarde acknowledged the dilemma at the Bank’s April press conference. “The economic outlook is highly uncertain and will depend on how long the war in the Middle East lasts and how strongly it affects energy and other commodity markets as well as global supply chains,” she said. Economists at KPMG and Pictet Asset Management have flagged the June ECB meeting as a potential pivot point — where, if oil prices remain elevated and second-round effects on wages materialise, a 25-basis-point rate increase becomes politically viable.

Central banks control overnight lending rates, not long-term bond yields. Fixed-rate mortgages are priced off government bond yields and swap rates, which respond to inflation expectations. When oil prices spike due to Middle East conflict and investors anticipate persistent inflation, they sell bonds, yields rise, and mortgage rates follow — regardless of central bank policy decisions.

The Bank of England has held at 3.75%, with UK CPI at 3.3% in May. The Federal Reserve, meanwhile, held steady at its May meeting; traders have now completely priced out rate cuts for 2026, while a minority is pricing in a hike before year-end. The Consumer Price Index hit 3.8% in April, its highest level since May 2023. The Producer Price Index surged to a 6% annual rate.

The Housing Market Feels the Freeze

The second-order effects on housing markets are already measurable. Mortgage applications for new home purchases fell 4% in the week ending 9 May compared with a week earlier, according to the Mortgage Bankers Association. Zillow reported that buyer demand fell across April relative to March. One in four Americans paused major purchases — including homes and cars — due to war-driven economic uncertainty, according to a Redfin survey from early May.

“Spring has not sprung for the home-selling season this year,” said Mark Hamrick, senior economic analyst at Bankrate. “It is essentially a stuck or frozen market right now.” Lisa Sturtevant, chief economist at Bright MLS, put it more sharply: the conditions that were supposed to define 2026 — improving affordability, rising listings, rates trending toward the high fives — have been reversed. “The conflict with Iran, the conflict in the Middle East has created a lot more uncertainty and volatility than we had anticipated.”

The knock-on effects extend beyond the transaction itself. As the National Association of Realtors chief economist Lawrence Yun noted, home sales generate ancillary spending — on remodelling, lawn care, removals, mortgage origination. A frozen housing market is not just a housing problem; it is a modest but meaningful drag on overall consumption. The S&P Cotality Case-Shiller national home price index showed annual growth of just 0.7% in the year to February 2026, and half of the 50 largest US metro areas saw outright price declines over the past year.

In Europe, the ECB’s March projections flagged that “higher mortgage rates weigh on affordability” as a constraint on housing investment, even as the baseline assumed some energy price stabilisation. The adverse scenario — in which 40% of oil and LNG flows through the Strait of Hormuz are disrupted in the second quarter of 2026 — contemplated a more severe inflation and growth divergence. Parts of that adverse scenario now look uncomfortably close to current conditions.

The refinancing channel has also seized. Homeowners who took on variable-rate or hybrid products expecting rate cuts this year face direct resets that can raise their monthly payments quickly. Those who planned cash-out refinancing at lower rates have seen potential savings evaporate. The 15-year fixed refinance rate stood at 5.72% on 7 May, up from 5.64% the prior week. The window that briefly appeared to open in early 2026 has closed.

The Case for Equanimity — and Its Limits

Not every analyst reads the situation as unambiguously bleak. There is a reasonable counterargument, and it deserves to be heard clearly.

First, the rate volatility of this period has cut both ways. When ceasefire signals emerge — as they did in early April, when 30-year US rates briefly retreated to around 6.25% — markets respond quickly. “As the cost of crude fell and it appeared there were building blocks of an agreement to open the Strait of Hormuz, rates declined,” said Del Palacio, a mortgage banking executive cited by CBS News in late April. Any sustained diplomatic breakthrough could compress bond yields and mortgage rates meaningfully within days. The bond market giveth as quickly as it taketh.

Second, the current rate environment, though painful relative to 2025 expectations, is not historically extreme. The 6.37% 30-year rate recorded by Freddie Mac in early May remains below the 6.76% average posted during the same period last year. Borrowers who locked in before the conflict are unaffected entirely. The US housing market’s structural reliance on 30-year fixed-rate instruments means millions of existing homeowners are insulated from current rate movements.

Third, and most structurally, Alessia Berardi, head of global macroeconomics at Amundi Investment Institute, noted that every major central bank that held rates last week “leaned hawkish” — meaning they retained the credibility and the tools to act if inflation proves persistent. “These central banks are buying time to understand how long the conflict goes on, the oil price remains persistently high, and possibly gathering information on possible second-round effects,” she said. That optionality has value.

Yet the optionality comes with a cost. Buying time is not the same as solving the problem. And the limits of central bank patience are not unlimited: if oil stays above $100 per barrel through the summer, if US CPI stays above 3.5%, and if wage data begin to show second-round effects, the conversation shifts. Rate hikes — not cuts — become the live discussion. Pictet Asset Management’s lead economist Nikolay Markov warned that a sustained Strait of Hormuz closure and oil at $150 per barrel could push eurozone inflation to 6%, double April’s level.

That scenario would not just reshape mortgage markets. It would reshape the entire macroeconomic framework that households and policymakers spent the past two years constructing.

The Geopolitics of Home Finance

There is something almost vertiginous about the transmission chain at work here: a military decision made in Washington and Tel Aviv, executed on 28 February, has cascaded through oil tanker routes, energy futures markets, government bond auctions, swap rate desks at European lenders, and into the monthly outgoing of a family in Manchester or Minneapolis trying to buy their first home. No one in that chain exercised any particular agency. The mortgage broker repricing at 6am on 3 March was not making a geopolitical statement. They were doing arithmetic.

That is precisely what makes this episode instructive. The separation many households assume exists between global conflict and personal finance is largely illusory — it holds only when energy markets remain stable. When they don’t, the cost flows everywhere, invisibly and at speed.

The spring of 2026 was supposed to deliver a better housing market. The listings were rising. The rate trajectory was favourable. Affordability was, at last, beginning to improve. The war in Iran didn’t ask for anyone’s plans.