The global war against the dollar is becoming increasingly visible in the tensions surrounding the Strait of Hormuz. What appears to be a regional geopolitical crisis is, in reality, part of a deeper transformation of the international monetary system.

For decades, the global energy market has relied on the petrodollar system, established in the 1970s. This framework effectively required that most international oil transactions be settled in US dollars. As a result, global demand for the dollar remained structurally strong.

However, recent geopolitical developments suggest that several countries are now attempting to challenge that monetary architecture. If successful, these initiatives could reshape global finance, influence capital flows, and significantly affect international investment strategies.

A Monetary Conflict That Predates the Current Crisis

The monetary confrontation surrounding the Strait of Hormuz did not begin with the latest tensions between Iran, the United States, and their respective allies.

A similar episode occurred earlier this year in Venezuela. In January, the government of Nicolás Maduro announced its intention to sell part of its oil production outside the traditional dollar-based system, using the Chinese yuan or alternative financial channels.

This strategy was not entirely new. As early as 2017, Caracas had already expressed its intention to move away from dollar-denominated oil transactions and adopt a basket of currencies, including the yuan.

In response, Washington intensified economic and financial pressure on the country. Sanctions targeted the national oil company PDVSA as well as financial networks enabling Venezuelan oil exports.

This episode illustrates a key reality of modern geopolitics: currency dominance has become a central instrument of power.

Emerging Powers and the Push for De-Dollarisation

Over the past decade, several emerging economies have sought to reduce their dependence on the US dollar in international trade.

China, Russia, and Iran have played a leading role in this shift. In addition, several members of the BRICS+ group have promoted initiatives aimed at creating a less dollar-centric global financial system.

Western sanctions have significantly accelerated this movement. After the start of the war in Ukraine in 2022, Russia rapidly expanded alternative payment mechanisms and increased the use of national currencies in international trade.

At the same time, China has been actively promoting the internationalisation of the yuan. Beijing encourages energy contracts denominated in its currency and continues to develop financial infrastructure capable of competing with Western systems.

Iran, which has faced decades of sanctions, has also experimented with parallel payment mechanisms designed to bypass the dollar-dominated financial network.

Within this broader context, the BRICS countries are even exploring the possibility of a shared settlement system or a common currency for international trade.

Beyond economics, the objective is clearly geopolitical. Dollar dominance gives the United States significant influence over the global economy. Control of financial transactions allows Washington to impose extraterritorial sanctions and restrict access to international banking networks.

The Strait of Hormuz as a Strategic Monetary Lever

Against this backdrop, Iran’s recent initiative regarding the Strait of Hormuz carries significant strategic implications.

Tehran has suggested that certain oil tankers could pass through the strait only if transactions are settled in yuan rather than dollars. Such a condition effectively turns a maritime chokepoint into a powerful monetary tool.

The Strait of Hormuz is one of the most critical energy corridors in the world. Approximately one-fifth of global oil supplies transit through this narrow waterway every day.

If even a portion of those oil flows were priced and settled in yuan instead of dollars, the consequences could be substantial.

Major Asian economies, which are the primary consumers of Gulf oil, could gradually adapt to this new settlement system. For China, such a development would represent a historic opportunity to strengthen the global role of its currency.

Why the Dollar’s Dominance Matters for the United States

For Washington, any challenge to the petrodollar system represents a strategic concern.

Since the 1970s, global energy markets have largely operated in US dollars. This structure creates continuous global demand for the American currency.

As a result, the United States benefits from a unique financial advantage. International investors and central banks hold large quantities of US dollars and US Treasury bonds.

This mechanism is often referred to as petrodollar recycling.

However, if energy transactions begin to shift toward other currencies, the balance could gradually change. A reduction in global demand for dollars could weaken one of the pillars supporting US financial dominance.

The Global War Against the Dollar and Its Impact on Investments

The global war against the dollar could have significant consequences for international investment and financial markets.

First, central banks may gradually diversify their foreign exchange reserves. Currently, the dollar remains the dominant reserve currency worldwide. Nevertheless, increased use of alternative currencies in trade could encourage greater diversification.

Second, capital flows could increasingly shift toward emerging markets participating in alternative financial systems. Financial infrastructure developed by China and other emerging economies could attract greater levels of investment.

Furthermore, US government bond markets might face pressure if global demand for Treasury securities declines.

For institutional investors, these structural shifts could lead to greater portfolio diversification across currencies and regions. Assets denominated in yuan or other regional currencies may gain importance over time.

Commodity markets could also evolve. Energy contracts denominated in multiple currencies may gradually fragment the global energy trading system.

A Slow but Potentially Historic Monetary Transition

Despite these developments, predicting the immediate end of dollar dominance would be premature.

History demonstrates that transitions between dominant global currencies often take decades. For example, the British pound took nearly half a century to relinquish its global monetary leadership to the US dollar during the twentieth century.

Nevertheless, current geopolitical and economic trends suggest that the global financial order is entering a period of transformation.

From Venezuela to the Strait of Hormuz, and through initiatives led by the BRICS nations and the gradual rise of the yuan, multiple signals point toward a reconfiguration of the global monetary system.

Behind geopolitical tensions, sanctions, and energy disruptions lies a deeper struggle: the competition to determine which currency will shape the global economy in the coming decades.

For governments, investors, and financial institutions alike, the stakes are enormous. The currency that dominates international trade ultimately influences capital flows, sovereign debt dynamics, and the stability of global financial markets.