Voima Weekly #37 – Swap Lines

Israeli fighter jets and a tanker aircraft conducting mid-air refueling – fuel is transferred during flight to ensure the operation continues without interruption. A swap line of sorts – the system stays in the air because it is continuously refueled. Image: stock photo

In recent weeks, markets have started to pay attention to a term that usually stays out of the headlines: swap lines. In reality, they are one of the key mechanisms holding the entire modern financial system together.

A swap line simply means that the Federal Reserve provides U.S. dollars to another central bank. Not through markets or commercial banks, but directly at the core of the system. In return, it receives local currency as collateral. Over time, the transaction is unwound.

Technically, it is a loan. In practice, it is permission to use the world’s most important currency exactly when it is needed most.

The global system runs largely on dollars. Trade, finance, collateral, and debt all move through the dollar at some level. This means that in times of stress, the question is not just price - it is availability. Do you have access to dollars or not.

Without that access, dollars are obtained by selling assets, often U.S. Treasuries or gold. When many participants do this simultaneously, bond prices fall and yields rise. Since government bonds serve as the benchmark “risk-free” rate, their yields form the foundation for nearly all other financing — corporate debt, bank funding, and mortgages. When this base level rises, the cost of capital increases across the system.

This tightens financial conditions and can trigger a self-reinforcing cycle: the more dollars are needed, the more assets must be sold.

At the same time, gold can come under selling pressure. Not because its role as a store of value has disappeared, but because in a liquidity crisis, what is needed specifically are dollars. This is one reason why gold can temporarily decline precisely when uncertainty is at its highest.

Swap lines break this dynamic. They allow participants to remain within the system without forced selling, acting as a stabilizing force.

But at the same time, they reveal something essential.

The strength of the dollar does not come only from its use. It comes from its availability, selectively. When the United States opens swap lines, it is not only providing liquidity. It is signaling who is inside the system and who is not. Europe, Japan, and other core allies have long been part of this network. Now the discussion has extended toward the Persian Gulf — and this development is not accidental.

Energy, capital flows, and geopolitics are all connected through liquidity.

At this point, the traditional petrodollar narrative is incomplete. Pricing oil in dollars creates demand. Swap lines ensure supply. Together, they form a system where the dollar becomes both a necessity and a safety net. This can also be seen as a form of power. The dollar system is not maintained by markets alone, but actively supported through liquidity, financial infrastructure, and geopolitical decisions. Recent developments in the Middle East serve as a reminder that energy and finance are not separate systems.

Swap lines are therefore not an isolated tool, but a response to this structural reality. When global dollar funding tightens, the Federal Reserve effectively acts as the lender of last resort — not just domestically, but globally, through central banks.

In other words, theory and practice meet.

A similar logic exists in gold, but from a different starting point. Central banks have long used so-called gold swap arrangements, where gold is used as collateral to obtain liquidity without selling it permanently. In practice, this means receiving currency, often dollars, while committing to repurchase the gold later.

The distinction is important. While dollar-based swap lines rely on trust and central bank networks, gold-based arrangements rely on the asset itself. Liquidity is not granted because you are part of the system, but because you have the collateral. This is why gold often becomes a last resort when the credit-based system tightens.

This is also visible in markets. During liquidity stress, gold may be sold to obtain dollars, while at the same time it is used as collateral to access liquidity without selling. The same asset acts both as a buffer and a bridge — especially when the system is under the most strain.

Swap lines are not permanent money. They are designed to be unwound as conditions normalize. In practice, this means dollar liquidity flows into the system during stress and is withdrawn when pressures ease.

But this only works if the system can withstand the tightening.

This dynamic is particularly visible in energy-driven shocks. When oil prices rise, the same amount of energy requires more dollars. This increases the global demand for dollars precisely when financial conditions are already strained. Without sufficient liquidity, countries and institutions are forced to sell assets to obtain dollars, tightening the system further.

Swap lines interrupt this cycle by providing dollars directly through central banks, allowing economic activity to continue without forced selling.

At the same time, they create a less visible but structurally important effect. Each crisis injects more liquidity into the system than is withdrawn before the next disruption. The money supply does not grow in a straight line, but in steps.

As commodity prices rise, this mechanism intensifies. More dollars are needed to sustain the same level of economic activity. And the more the system is supported, the more its long-term balance shifts.

Debt in this system is not repaid with stronger money, but with weaker money. As long as the system depends on continuous refinancing of debt, liquidity is not an exception — it is a requirement.

This is not only a macro-level phenomenon. It has directly affected the behavior of every saver and investor, whether they realize it or not. Global monetary policy has effectively forced risk-taking. If you simply sit in euros or dollars, you will almost certainly lose purchasing power over time. This is not a view — it is a structural feature of the system.

If you are heading to Lapland in winter, you pack warm clothes. Not because you want to, but because the conditions demand it. The same applies to money — it is essential to adapt to the monetary environment.

The dollar remains the core of the system. But every intervention tells the same story:

The dollar strengthens in times of crisis, but the very actions that save it ultimately weaken it over time. That is why we are living in a particularly interesting moment: the liquidity already created, and the liquidity yet to come, will eventually have to be absorbed into the real economy.

If this happens in the traditional way, it will ultimately show up in everyday life: in the price of lunch, a cup of coffee, and the cost of living. The key question is therefore not only what happens in the markets, but how we preserve our purchasing power in this environment.

Liquidity resolves crises — but purchasing power determines the outcome.

– Marko Viinikka
Founder, CEO
Voima Gold Oy

Disclaimer: Voima Weeklies are the personal writings of the undersigned. They do not necessarily represent the official view of Voima Gold Oy or any other company, nor do they constitute investment advice or a recommendation to purchase securities.