Iran Conflict Reshapes Mortgage Rate Forecasts: Lower Rates Now Unlikely
Forecasting mortgage rates beyond the immediate future remains an exceptionally challenging endeavor, though not entirely impossible. Contemporary econometric models, enhanced by artificial intelligence and rigorous backtesting, serve as sophisticated prediction tools. When integrated with market expectations and comprehensive business cycle analyses, these systems can generate forecasts that offer reasonable insights into the probable trajectory of future interest rates.
The Unpredictable Variable: Geopolitical Turmoil
The fundamental limitation of these advanced models, however, is their inability to account for unforeseen geopolitical events. A prime example is the ongoing war in Iran. Few, if any, economists anticipated a staggering 67 percent surge in oil prices at the outset of this year. Such dramatic and unexpected developments possess the capacity to fundamentally recalibrate the mortgage rate landscape, and that is precisely what is unfolding currently.
For prospective homebuyers shopping for mortgages or existing homeowners with variable-rate loans who were optimistically awaiting rate reductions, a critical reassessment is now imperative. The risk of interest rates moving higher has intensified significantly. Individuals operating with limited financial flexibility should strongly consider adopting a more conservative approach to their mortgage strategy.
Inflation and Oil: The Primary Drivers
While numerous factors influence interest rates, inflation consistently occupies the top position in this hierarchy. Among the various elements that can rapidly accelerate inflation, few are as potent as an oil crisis. Historical precedents from 1974, 1979, and 2022 demonstrate that oil supply shocks can add a full percentage point or more to inflation projections almost overnight. Such an inflationary spike alone could propel mortgage rates upward by a comparable margin.
For oil price increases to exert sustained upward pressure on mortgage rates, however, the supply disruption must be prolonged. A brief spike lasting only a few weeks is insufficient. According to recent analysis from Scotiabank Economics, every sustained increase of $10 per barrel in oil prices could contribute an additional 0.2 percentage points to the Consumer Price Index (CPI) in both 2026 and 2027. As of current assessments, West Texas Intermediate (WTI) crude oil has already surged by over $37 per barrel this year.
Sustained Threats and Central Bank Responses
The critical uncertainty revolves around the duration of the conflict in Iran. Should the warfare be brief, will Iranian proxies continue to disrupt oil shipping routes, such as the vital Strait of Hormuz? Some analysts caution that assuming a conventional U.S. military victory would guarantee an end to such attacks is flawed, contradicting both modern military strategy and historical patterns.
The likelihood that Iran or its affiliated groups will persist in targeting maritime infrastructure or oil facilities, even after a conventional conflict subsides, is not negligible. Persistent residual threats could maintain elevated WTI oil prices for months, with material consequences for inflation, government bond yields, and consequently, mortgage rates.
In fact, this geopolitical instability has already prompted several global central banks to contemplate potential interest rate hikes. Notably, the Reserve Bank of Australia, whose policy rates exhibit a high correlation exceeding 0.75 with Canadian rates, is among those evaluating tighter monetary policy. This global shift underscores the broad economic ramifications of the Iran conflict, directly impacting borrowing costs for homeowners and buyers across markets.
The probability of witnessing lower mortgage rates in 2026 has consequently diminished substantially, transitioning from a tentative "maybe" to a more definitive "probably not" for many financial observers.
