OECD warns inflation won’t quit—while US mortgage rates jump above 7% and Turkey growth cools

The OECD has updated its macro outlook, raising inflation projections for most G20 economies while trimming growth expectations, with notable exceptions for China and Saudi Arabia. On the same day, the OECD also lifted Turkey’s inflation forecast and reduced its growth outlook, signaling a renewed risk of policy trade-offs in Ankara. In parallel, US mortgage rates surged above 7% to the highest level in more than two years, adding pressure to a housing market already constrained by high prices and weak transaction activity. Separately, Fed policymaker Collins warned that inflation could be “notably” higher even after supporting another rate hike, reinforcing the idea that the disinflation path may be bumpier than markets priced. Geopolitically, this cluster matters because it tightens the global policy synchronization that underpins cross-border capital flows, sovereign funding costs, and currency stability. If inflation proves stickier, central banks—especially the Fed—may keep restrictive conditions longer, which tends to strengthen the dollar and raise the hurdle rate for risk assets worldwide. That dynamic can disadvantage emerging markets with refinancing needs and weaker external buffers, making Turkey’s forecast downgrade particularly sensitive for regional risk sentiment. Meanwhile, the OECD’s broader G20 message implies that the “soft landing” narrative is losing credibility, potentially increasing political pressure on governments to cushion households and support growth. The immediate winners are typically sectors that benefit from higher rates and resilient pricing power, while the losers are leveraged borrowers, rate-sensitive housing-related businesses, and economies relying on credit expansion. Market and economic implications are already visible in housing and credit transmission. US mortgage rates above 7% typically translates into higher monthly payments, which can reduce affordability and slow sales volumes, weighing on homebuilders, mortgage originators, and housing-linked consumer spending. The report that nearly 10% of borrowers chose riskier mortgages as rates climbed over 7% suggests a deterioration in underwriting quality and a higher probability of future credit stress, which can feed into mortgage-backed securities performance and bank risk metrics. Across the macro complex, the OECD’s “inflation linger” framing can lift front-end rate expectations, supporting yields and tightening financial conditions, while also pressuring currencies in countries with higher inflation differentials. For investors, the key transmission channels run through mortgage spreads, bank funding costs, and global risk premia rather than through commodity demand alone. What to watch next is whether the Fed’s restrictive stance remains consistent with incoming inflation data and whether mortgage-rate volatility persists. The trigger point is a sustained move in US mortgage rates above the 7% threshold alongside evidence of worsening credit selection, such as rising shares of higher-risk products or delinquency indicators. For Turkey and other rate-sensitive economies, the key indicator is whether inflation expectations re-anchor or continue to drift upward, forcing further tightening or widening fiscal-financing pressure. In the near term, OECD and ADB forecast updates will shape market expectations for 2026–2027 growth, so watch for revisions to inflation persistence and the implied path of policy rates. Escalation risk rises if inflation surprises upward again while housing credit quality deteriorates, but de-escalation is possible if mortgage rates stabilize and inflation prints cool enough to reduce the probability of additional Fed hikes.

Geopolitical Implications

• 01

  Prolonged restrictive US policy could tighten global financial conditions and shift capital flows toward safety.

• 02

  Turkey’s inflation/growth downgrade raises regional risk sensitivity and refinancing concerns.

• 03

  Broad G20 forecast downgrades can increase domestic political pressure to cushion households and slow reforms.

• 04

  US housing and credit stress can spill into global risk appetite and funding markets.

Key Signals

• —Whether US mortgage rates remain above 7% and how quickly they revert.
• —Changes in the share of higher-risk mortgages and any early delinquency signals.
• —Inflation expectation re-anchoring in Turkey and policy response intensity.
• —MBS spreads, bank funding costs, and shifts in front-end rate expectations.