A large share of the world's dollar deposits sits at banks outside the United States. These balances are dollars in every commercial sense but not in every regulatory one.
What the term actually describes
The name is historical and misleading. A eurodollar is any dollar-denominated deposit held at a bank outside US jurisdiction, whether that bank is in Europe, Asia or the Caribbean.
The dollars themselves never leave the US banking system. What moves is the claim: a depositor holds an obligation from a foreign bank, and that bank in turn holds dollar balances domestically.
The market grew because non-US banks could accept dollar deposits without the reserve and rate restrictions that applied to domestic banks at the time.
Why the distinction matters for depositors
Deposit insurance is territorial. A dollar deposit at a foreign branch is generally not covered by US deposit insurance, and coverage in the host country may not extend to foreign currency accounts.
Depositors in this market are therefore mostly institutions rather than households. They are relying on the bank's own credit rather than on a guarantee.
The rate paid usually reflects that. Wholesale dollar deposits abroad have historically paid more than insured domestic accounts, which is the compensation for the difference.
How the market funds global trade
A large share of international trade is invoiced in dollars even when neither party is American. Firms and banks in those transactions need dollar funding without US accounts.
The offshore deposit market supplies it. Banks take dollar deposits abroad and lend dollars to importers, exporters and other banks in the same market.
This is why dollar funding conditions abroad affect trade finance availability worldwide, independently of conditions inside the domestic US banking system.
Why stress abroad reaches home
When foreign banks find dollar funding scarce, they compete for it, bid up its cost, or shrink dollar lending. Trade credit is often among the first exposures reduced.
Central banks have addressed this with swap arrangements that let a foreign central bank obtain dollars and lend them onward to banks in its jurisdiction.
These facilities exist because offshore dollar shortages transmit into US markets through funding costs and asset sales, not only through foreign economies.
What a US saver should take from it
Retail savers rarely hold offshore dollar deposits, but the market shapes the reference rates used in loans, and it influences how banks price short-term funding.
It also explains why dollar conditions are watched globally. Decisions taken by the US central bank affect borrowers who have no other connection to the United States.
Understanding where a deposit is legally held, and which regulator stands behind it, is the practical distinction to keep in view.