For much of the past year, investors had begun to believe that emerging markets were finally emerging from the shadows of the post-pandemic monetary cycle. Inflation was gradually moderating, central banks across Latin America had started easing policy, currencies were stabilising, and the prospect of lower US interest rates promised a more supportive global financial environment. That narrative is now unravelling. The latest wave of selling across emerging-market currencies is not simply another episode of risk aversion. It reflects the convergence of several structural forces that rarely occur simultaneously: a renewed energy shock, higher long-term US interest rates, a strengthening dollar and an increasingly unstable geopolitical environment centred on the Middle East. Each of these developments individually would represent a challenge. Together, they create precisely the environment in which emerging markets historically struggle.

The immediate catalyst has been the escalation of the conflict between the United States and Iran. Brent crude has moved above USD 100 per barrel following attacks on Saudi tankers in the Red Sea and renewed concerns over both the Strait of Hormuz and Bab el-Mandeb. President Donald Trump has warned of a possible “massive” military response should further attacks be attributed to Iran through the Houthi movement. Markets understand what this means. The conflict is no longer confined to military exchanges. It is threatening the infrastructure of global trade. The disruption of shipping routes increases freight costs, extends delivery times and raises insurance premiums. Energy markets respond immediately, but the consequences spread well beyond oil. Every additional logistical bottleneck eventually finds its way into transport costs, food prices and industrial production.

For emerging economies, this transmission mechanism is particularly damaging. Unlike developed economies, many emerging markets remain highly dependent on imported energy. Oil is not simply another commodity. It is a critical input into transport, electricity generation, agriculture and manufacturing. Higher crude prices therefore act as an immediate tax on economic activity. Countries that import energy experience a rapid deterioration in their trade balances. Current-account deficits widen. Inflation accelerates. Foreign exchange reserves come under pressure. Currencies weaken. Central banks are forced to postpone or even reverse monetary easing. The cycle becomes self-reinforcing. This is precisely what markets have begun to price. Almost every major emerging-market currency has weakened as investors seek the safety of dollar assets. The South African rand has suffered particularly heavily, despite the central bank unexpectedly keeping interest rates unchanged. Latin American currencies, including the Mexican peso and Brazilian real, have also come under pressure after months of relative resilience.

At first glance, this may appear contradictory. Many commodity-exporting countries should theoretically benefit from higher oil prices. Reality is considerably more complicated. Higher energy prices certainly improve the terms of trade for exporters such as Brazil or Colombia. Yet global investors rarely differentiate during periods of heightened geopolitical uncertainty. When volatility increases, capital does not search for nuance. It searches for safety. The dollar therefore becomes the dominant beneficiary. This is one of the defining characteristics of international financial markets. The United States may itself be responsible for part of the geopolitical uncertainty, but the dollar remains the world’s primary reserve currency. During periods of stress, investors continue to liquidate riskier assets and accumulate dollar liquidity. Safe-haven status outweighs political considerations.

This dynamic is reinforced by developments in the US bond market. Thirty-year Treasury yields have remained persistently above 5%, not because investors suddenly expect dramatically stronger growth, but because they demand greater compensation for financing the expansion of fiscal deficits in an environment of structurally higher inflation. At the same time, the Federal Reserve has less room to reduce interest rates as energy prices and tariffs threaten to prolong inflationary pressures. The consequence is straightforward. Higher US yields attract international capital. A stronger dollar increases financing costs for emerging economies. Dollar-denominated debt becomes more expensive to service. Capital flows reverse. Currencies weaken further. For many emerging markets, this represents a familiar sequence.

What makes the current environment more dangerous is that it is occurring alongside a second structural shift. Global trade itself is changing. The Trump administration has now institutionalised a new tariff regime covering around sixty economies. Although China remains an important target, the broader objective is much wider. The United States is gradually replacing the rules of globalisation built around efficiency with a model built around strategic resilience. Supply chains are becoming shorter. Production is becoming regionalised. Trade is becoming increasingly political. For emerging markets that built their development model around export-led integration into global supply chains, this represents a profound long-term challenge. The issue is not necessarily that exports collapse. Rather, the cost of participating in global trade steadily increases. Tariffs. Compliance requirements. Security reviews. Industrial subsidies. Technology restrictions. Every additional layer reduces efficiency. Growth becomes structurally slower.

Emerging economies therefore face two simultaneous pressures. Externally, higher oil prices, a stronger dollar and elevated US yields tighten global financial conditions. Internally, slower global trade reduces one of their traditional engines of growth. The policy choices become increasingly difficult. Should central banks defend their currencies by maintaining high interest rates? Or should they support domestic growth by easing monetary policy despite rising inflation? Turkey illustrates this dilemma perfectly. Its central bank has kept rates unchanged despite the renewed rise in energy prices, recognising that inflation remains fragile while economic activity continues to require support. Paraguay has reached a similar conclusion, maintaining its policy rate while acknowledging that geopolitical developments threaten the disinflation process. Neither decision is comfortable. Both reflect the narrowing room for manoeuvre available to policymakers. The broader implication extends beyond individual countries.

Emerging markets have spent the past two decades benefiting from a relatively benign international environment characterised by expanding global trade, abundant liquidity, low energy prices and predictable geopolitical relationships. That world is disappearing. Instead, they now confront an international system defined by geopolitical fragmentation, recurring supply shocks, structurally higher interest rates and growing competition for global capital. Emerging markets must therefore offer significantly higher returns simply to remain competitive. This has important implications for investors. The traditional assumption that emerging-market assets automatically outperform when the Federal Reserve approaches the end of its tightening cycle appears increasingly outdated.

Perhaps the most important lesson is that emerging markets are once again becoming price takers rather than price makers. Their economic outlook is increasingly determined by forces beyond their control. Oil prices are determined in the Gulf. Interest rates are determined in Washington. Trade policy is determined in Washington and Beijing. Shipping costs are determined in Hormuz and the Red Sea. Artificial intelligence investment is determined in Silicon Valley. Emerging markets simply absorb the consequences. This is why the current episode should not be viewed as another temporary correction driven by geopolitical headlines. It represents the convergence of multiple structural trends that reinforce one another. For much of the past decade, investors spoke of the “search for yield”. Today, they are engaged in something very different. They are searching for resilience. And in that new world, emerging markets are entering perhaps their most demanding environment since the global financial crisis.