The petrodollar system is supposedly the hidden engine behind US dollar dominance — the secret deal that keeps the world buying oil in dollars and, by extension, keeps America financially supreme. It's one of the most repeated stories in geopolitics. There's just one problem: when you actually look at the numbers and the declassified documents, the petrodollar system reveals itself as the biggest myth in modern geopolitics. That doesn't mean there's zero truth to it. But the core of the story — that the dollar's reserve currency status depends on oil being priced in dollars — is simply wrong.

What Is the Petrodollar System — And Is It Real?

The popular version of the petrodollar story goes something like this. In 1971, Nixon abandoned the gold standard, causing dollar volatility and inflation. Then in 1973, Arab nations including Saudi Arabia cut oil supplies and embargoed countries that supported Israel, triggering a massive oil price spike and fuel shortages in the US. In response, in 1974, the US and Saudi Arabia struck a historic deal: the Saudis would price oil exclusively in US dollars, invest those dollars back into American banks and treasuries (so-called petrodollar recycling), and in return the US would provide Saudi Arabia with security guarantees and economic development support.

It's a clean, compelling narrative. And it would explain why the US has historically reacted so aggressively whenever countries like Iran, Iraq, or Venezuela announced plans to sell oil in other currencies — because doing so would supposedly undermine the dollar itself.

The problem? The actual declassified documents tell a completely different story.

What Did the 1974 US-Saudi Deal Actually Say?

In 2016, Bloomberg News obtained the previously confidential details of the 1974 US-Saudi Joint Commission on Economic Cooperation under the US Freedom of Information Act. The documents are remarkably clear about what the deal was actually designed to do.

The commission's stated goals were: fostering closer political ties through economic cooperation, assisting Saudi industrialization and development, recycling petrodollars, and facilitating the flow of American goods and technology to Saudi Arabia. One passage is especially revealing: "In helping the Saudis to find a way to invest their large and growing financial reserves, we will give them added incentives to continue to produce oil in the quantity needed to meet world demand — at stable and hopefully lower price levels."

Notice what is entirely absent from those documents. There is no mention whatsoever of Saudi Arabia committing to price oil exclusively in US dollars. None. The Saudis actually continued accepting British pounds for oil well after 1974, which makes perfect sense now that we know dollar exclusivity was never part of the agreement.

So what was the deal really about? Oil price stability. The US wanted cheap, reliable oil. The Saudis wanted development assistance and a security umbrella. That's the actual bargain — and it's a genuinely important one, just not the one that's been mythologized.

Why Is the Dollar Really the World Reserve Currency?

Here's the part of the story that the petrodollar myth gets most wrong. By 1974, the US dollar was already the undisputed global reserve currency. South American copper exporters were invoicing in dollars. European and Japanese industrialists were pricing exports in dollars. The dollar didn't need oil to cement its dominance — that dominance was already there.

A far more credible explanation for dollar dominance is the rise of the eurodollar market — the system of dollar-denominated deposits and lending that grew outside the United States from the 1950s onward. By the mid-1970s, data on official central bank reserves showed the US dollar utterly dominating all other currencies, including the British pound. The petrodollar deal didn't create this. It inherited it.

And critically, the relationship between the Gulf states and US financial markets runs in the opposite direction from what the myth implies. The oil exporters needed the US dollar — not the other way around. US financial markets were the only markets in the world deep and liquid enough to absorb the billions the Gulf countries were earning from oil. Investing petrodollars in, say, British government debt would have risked triggering a UK debt crisis if Gulf states ever needed to sell quickly. US treasuries, by contrast, were so vast that even large sell-offs would barely move the price.

How Much US Debt Does Saudi Arabia Actually Own?

This is where the myth really collapses under data. Even at the peak of petrodollar recycling in the 1980s, Gulf countries held only a very small fraction of total US treasury holdings. Fast forward to today, and Saudi Arabia — the world's biggest oil exporter — sits far down the list of US debt holders, behind India, Taiwan, Ireland, Luxembourg, Belgium, the United Kingdom, and Japan, among others.

What about equities? Gulf sovereign wealth funds are genuinely enormous, with combined assets of roughly $4 trillion. But US stock markets alone are worth approximately $72 trillion. Estimates suggest Gulf funds hold around 1% of the US stock market combined. Petrodollar recycling is real — it's just not remotely as important as the myth suggests. The petro states park their money in US markets because there's simply nowhere better to put it, not because they're propping up the dollar.

Is China's Yuan a Real Threat to the Petrodollar?

Iran recently floated the idea of requiring tankers passing through the Strait of Hormuz to pay in Chinese yuan rather than dollars. Headlines erupted about the petrodollar system being under threat once again. But if the petrodollar system was never really the foundation of dollar dominance, then these announcements are far less significant than they sound.

To understand why, consider scale. The entire global oil market in 2025 was worth approximately $3 trillion annually. Foreign exchange markets, by contrast, trade roughly $9.6 trillion per day. Annualized, that's around $2,496 trillion in foreign exchange transactions versus $3 trillion in oil. The oil market is essentially invisible as a percentage of global currency flows. Even if every barrel of oil on earth were suddenly priced in yuan, the impact on dollar demand would be negligible.

Is Oil Still Relevant to US Dollar Dominance Today?

Even setting aside the myth's shaky historical foundations, the argument has weakened dramatically over time for two concrete reasons.

  • Oil is less important to economies than it used to be. At the height of the 1979 oil crisis, oil transactions represented roughly 13–15% of the US economy. Today that figure is closer to 5–7% of GDP. Modern cars use about half the fuel per mile that 1975 vehicles did. Efficiency gains have structurally reduced oil's economic footprint.
  • The US is now a net oil exporter. Since around 2020, US energy exports have exceeded imports. The original logic of petrodollar recycling — Gulf states earn dollars selling oil to the US, then reinvest those dollars back into US assets — no longer applies in the same way. The 1974 US-Saudi petrodollar agreement has reportedly not been renewed, and the Saudis have begun accepting other currencies for some oil transactions. Yet the dollar remains dominant.

Meanwhile, the real drivers of dollar demand today are East Asian manufacturing surpluses — countries like China, Japan, South Korea, and Taiwan running massive trade surpluses and accumulating dollars. These current account surpluses dwarf Gulf oil revenues as a source of global dollar demand.

What Would Actually Threaten Dollar Reserve Status?

The dollar could genuinely lose its reserve currency status one day. That's a real possibility worth taking seriously. But if it happens, it will have nothing to do with whether Saudi Arabia prices oil in dollars or yuan. It would come from structural shifts in global trade flows, the development of deep and liquid alternative financial markets, a loss of confidence in US fiscal policy, or the emergence of credible alternative reserve assets.

The 1974 US-Saudi agreement was historically significant — it restructured the geopolitics of the Middle East, made the US the security guarantor of the Gulf states, and helped produce more stable oil prices for decades. Those are real and important consequences. But the story that this deal created the petrodollar system and that the system underpins dollar dominance? That's the myth. The dollar was already dominant. It stays dominant because of the unmatched depth of US financial markets — not because of who accepts what currency at an oil terminal.

So the next time you see a headline warning that Iran or China is about to destroy the petrodollar and topple the dollar, you'll know exactly how seriously to take it.