Global dollar liquidity plays a central role in the global financial system and can significantly influence currencies, equities, bonds, commodities and other asset classes. Periods of constrained dollar liquidity have historically coincided with episodes of financial stress, particularly in markets and assets that depend heavily on U.S. dollar funding. When dollars become more difficult or expensive to obtain, the effects can spread rapidly through international markets, weighing on global trade, restricting credit creation and increasing funding costs for companies and governments with U.S. dollar-denominated liabilities.

Figure 1

What Is Global Dollar Liquidity?

Global dollar liquidity broadly refers to the availability of U.S. dollars and dollar-denominated funding throughout the international financial system. For the framework used in the BCA Research analysis on which this article was originally based, dollar liquidity incorporates measures including the U.S. monetary base and securities held in custody by the Federal Reserve for foreign official and international accounts. Dollar liquidity is not determined by one variable alone, with Federal Reserve policy, U.S. interest rates, banking conditions, international capital flows and demand for dollar-denominated assets all affecting the availability and cost of dollars globally.

Several dynamics can influence global dollar liquidity:

• Strong U.S. Economy: A strong economy can contribute to tighter monetary policy and higher U.S. interest rates, which may increase demand for dollar assets and strengthen the currency.
• Higher Interest Rates: Higher borrowing costs can reduce credit creation, capital expenditure and economic activity, while also increasing the cost of servicing dollar-denominated debt.
• Dollar Appreciation: Reduced dollar availability combined with strong demand can place upward pressure on the U.S. dollar, making dollar liabilities more expensive for foreign borrowers.
• Economic Slowdown: As tighter financial conditions slow economic activity, the Federal Reserve may eventually move towards more accommodative monetary policy.
• Foreign Reserve Management: Central banks and other official institutions frequently hold dollar-denominated assets, including U.S. Treasury securities, as part of their foreign exchange reserves.

The Federal Reserve can also provide dollar liquidity to foreign central banks through central bank liquidity swap arrangements, which are designed to ease strains in global dollar funding markets during periods of financial stress.

Key Drivers of Shrinking Dollar Liquidity

BCA Research’s July 2024 analysis highlighted several developments that could contribute to shrinking dollar liquidity and affect global asset prices:

1. Slower Dollar Flows Abroad:
   A reduction in the flow of U.S. dollars into international markets can tighten offshore dollar availability. When global demand for dollars remains high while supply becomes more constrained, dollar funding costs can increase.
2. Changes in U.S. Treasury Holdings:
   Changes in the way foreign governments, central banks and institutional investors allocate their reserves can influence the international circulation of dollars and demand for U.S. Treasury securities.
3. Federal Reserve Balance-Sheet Policy:
   Changes in the Federal Reserve’s balance sheet can influence bank reserves and broader financial conditions. Tighter monetary conditions can reduce the amount of readily available dollar liquidity throughout financial markets.
4. Increased Demand for Alternative Reserve Assets:
   Central banks have increasingly considered a broader mix of reserve assets, including gold. Changes in reserve allocation can influence demand for dollar-denominated assets and the international distribution of dollar liquidity.

Figure 2

Why Dollar Liquidity Matters for Global Markets

The U.S. dollar remains deeply embedded in the international financial system. According to the Bank for International Settlements, the dollar was on one side of 89.2% of all foreign exchange transactions in April 2025, demonstrating its continued dominance in global currency markets. This reliance on the dollar means changes in global dollar liquidity can have consequences far beyond the United States.

When acquiring dollars offshore becomes more expensive, businesses and governments with dollar-denominated obligations may need to allocate more capital towards debt servicing. This can reduce investment and capital expenditure and place additional pressure on economic growth. Dollar funding shortages can also create stress in financial markets, particularly where borrowers are highly exposed to U.S. dollar-denominated debt.

Global Dollar Liquidity and Foreign Exchange Risk

For companies involved in international trade, changes in global dollar liquidity can translate directly into foreign exchange risk. A stronger dollar can increase the local-currency cost of dollar-denominated imports, financing and debt repayments, while currency volatility can affect margins, cash flows, pricing decisions and the cost of hedging future foreign currency exposures.

Businesses with significant international exposure should therefore consider global dollar funding conditions alongside interest rates, economic growth expectations and currency market trends when developing their foreign exchange risk management strategies. Businesses looking to reduce uncertainty can also explore how forward exchange contracts can be used to manage FX risk as part of a broader hedging strategy.

Conclusion

Global dollar liquidity remains an important indicator of conditions across international financial markets. Changes in U.S. monetary policy, international demand for dollars, global funding conditions and capital flows can influence currencies, trade, investment and asset prices worldwide. Although the structure of global finance continues to evolve, the dollar remains the dominant currency across foreign exchange markets and a major currency for international payments and financing. Monitoring changes in dollar liquidity can therefore provide valuable context when assessing global financial conditions and foreign exchange risk.

At wauko we work with our clients to formulate and manage a comprehensive foreign exchange risk management policy. We will gladly assist you with your process to help you do more and grow more. Contact Dale Petersen on 021 819 7802 or at dpetersen@wauko.com to connect with us.

References

1. BCA Research – Implications Of Shrinking Dollar Liquidity – 12 July 2024
2. Bank for International Settlements – OTC Foreign Exchange Turnover in April 2025
3. Federal Reserve – Central Bank Liquidity Swaps