May 28, 2026 | Emerging Markets Debt
Portfolio Manager
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Rolling correlations between EM FX and U.S. Treasurys recently climbed to their highest level in more than a year. This move reflects not only the earlier rally across both asset classes, but also the more recent synchronized sell-off following a sharp rise in oil prices and renewed geopolitical tensions in the Middle East.
The question for investors is whether this marks the beginning of a broader macro regime shift—one in which EM FX becomes increasingly tied to U.S. duration and inflation expectations—or the current environment is more episodic in nature.
At present, the market appears to be trading through a very specific transmission mechanism: elevated oil prices are feeding inflation concerns, inflation concerns are pushing U.S. Treasury yields higher, and rising yields are strengthening the U.S. dollar. That stronger dollar, in turn, has become the dominant driver of global currency markets, weighing on both developed market (DM) and EM currencies.
EM FX has become highly sensitive to shifts in implied U.S. interest rates.
In this environment, EM FX has become highly sensitive to shifts in implied U.S. interest rates. When markets anticipate a more hawkish U.S. Federal Reserve, the result is typically higher U.S. Treasury yields, a firmer dollar, and pressure on EM currencies. We believe the recent rise in cross-asset correlations reflects this dynamic.
Still, it may be premature to conclude that a durable structural regime change is underway.
Much of the current market behavior appears tied to the geopolitical shock surrounding the conflict in the Middle East and the associated volatility in oil prices. Markets remain acutely focused on the risk of supply disruption and the implications for global inflation. As a result, oil prices have effectively become the common factor driving rates, currencies, and broader risk sentiment.
If geopolitical tensions ease and oil prices stabilize, these unusually high correlations could begin to normalize. We believe markets would likely shift back toward pricing country-specific fundamentals, growth differentials, and domestic policy trajectories rather than trading primarily through a single macro factor.
Importantly, even within today’s highly correlated environment, differentiation across EM FX remains significant. Oil-exporting countries—particularly those offering attractive carry—have generally outperformed. Brazil and Kazakhstan, for example, have benefited from higher commodity prices and favorable yield dynamics, generating strong returns for currency investors over recent months. In contrast, oil-importing economies in Asia, including India and Thailand, have faced currency pressure as rising energy costs deteriorate trade balances and complicate inflation outlooks. Countries with heightened geopolitical sensitivity, such as Egypt, have also experienced pronounced currency weakness.
The recent market moves have also prompted renewed discussion around stagflation risk. While higher oil prices and rising inflation expectations have caused markets to push out or even reverse anticipated rate cuts in some regions, it is still too early to conclude that investors are broadly positioning for a sustained stagflationary environment.
Until there is greater clarity on the geopolitical front, EM FX is likely to remain highly sensitive to oil price swings, U.S. rate expectations, and headline risk.
Most central banks remain in a cautious “wait-and-see” mode, recognizing that the geopolitical backdrop remains fluid. Markets still appear to believe that the conflict is ultimately more likely to conclude through negotiation than prolonged escalation. A reopening or stabilization of key energy transit routes, including the Strait of Hormuz, could quickly reverse some of the recent inflation fears and potentially trigger a relief rally across rates and risk assets.
Notably, equity markets in both DM and EM economies have remained relatively resilient despite the rise in geopolitical tensions. That resilience may suggest investors still view the broader global growth backdrop as intact. Continued enthusiasm surrounding AI investment and the potential productivity benefits associated with it may also be helping offset some macro concerns.
For the U.S. dollar, the outlook remains finely balanced. Before the recent geopolitical escalation, markets had increasingly embraced the idea of a structurally weaker dollar amid questions around U.S. exceptionalism, stretched valuations, and growing fiscal concerns. While the recent flight to safety temporarily interrupted that trend, a de-escalation in geopolitical tensions could allow the weaker-dollar narrative to reemerge.
If that occurs, EMs may again benefit from a combination of relatively stronger growth, supportive commodity prices, attractive carry opportunities, and compelling valuations. Until there is greater clarity on the geopolitical front, however, EM FX is likely to remain highly sensitive to oil price swings, U.S. rate expectations, and headline risk.
Daniel Wood is a portfolio manager on William Blair’s emerging markets debt team.
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