World Events → U.S. Impact
What if global demand for dollars shifts?
FactThree things people often blur together
Official reserves in dollars
Foreign central banks hold part of their reserves in dollar assets.
Measured by: IMF COFER (defined below)
Foreign holdings of Treasuries
Foreign governments and private investors own or trade U.S. Treasury securities.
Measured by: Treasury TIC (defined below)
Dollars in trade, banking, and payments
Invoicing, loans, and settlement in dollars around the world.
Measured by: BIS / SWIFT reports
A country can change one of these without abandoning the others.
The two datasets, in plain English
COFER — the IMF's Currency Composition of Official Foreign Exchange Reserves
A quarterly IMF dataset showing what share of the world's reported official reserves is held in dollars, euros, yen, and other currencies.
What it measures (observed data): The currency mix of reserves that central banks report to the IMF.
What it does not establish: It does not show why shares change. A share can fall because other currencies rose in value or because of valuation changes — not only because central banks sold dollars. Some reserves are not reported by currency.
IMF COFER dataset (official source)TIC — the U.S. Treasury's Treasury International Capital data system
Monthly U.S. Treasury data on how much in U.S. securities, including Treasuries, foreign investors hold, buy, and sell.
What it measures (observed data): Foreign holdings of U.S. securities and cross-border purchases and sales, by country and type of holder.
What it does not establish: It does not show investors' reasons for buying or selling, and it does not measure the global share of official reserves. Holdings can be recorded under the country where a custodian sits, not the true owner.
Treasury TIC system (official source)A fall in the dollar's reserve share is not, by itself, proof that central banks are selling. Observed data and interpretation are kept separate on this page.
AnalysisHow a shift away from the dollar could affect U.S. borrowing costs
This is a possible pathway, not an automatic or proven chain. Each step happens only if its condition holds.
Step 1. Buyers become less eager to buy more U.S. investments.
Economists call this weaker marginal demand for dollar assets — investors are less willing to purchase additional U.S. stocks, bonds, and bank deposits. If that happens, the dollar could lose some value, or the government might need to offer higher interest rates to attract buyers.
Condition: Only if other buyers — U.S. households, funds, banks, or other countries — do not fill the gap at similar prices.
Step 2. A weaker dollar could make imports cost more.
When the dollar buys less foreign currency, goods made abroad can cost more in U.S. stores. Companies may absorb some of that cost, so the effect on prices can be smaller.
Condition: Only if the dollar actually falls meaningfully and stays lower, and companies pass the cost on.
Step 3. Higher interest rates on government bonds could slowly raise the government's borrowing costs.
The annual return investors demand for lending money to the government is called the yield. Refinancing costs are the rates the government pays when it replaces debt that has come due. Because old debt is replaced a piece at a time, any increase builds gradually.
Condition: Only if yields rise and stay higher while debt is refinanced; growth, inflation, and Federal Reserve policy also move yields.
Each link depends on conditions. Domestic buyers, other foreign buyers, market conditions, growth, inflation, and policy can soften, offset, or reverse the result.
ScenarioThree scenarios — not predictions
Little change
What might happen: Dollar shares stay roughly stable; effects on yields are hard to detect.
What would need to be true: No strong alternative asset market; continued trust in U.S. markets.
Evidence that would support it: Stable COFER shares and steady foreign TIC holdings over several releases.
Gradual diversification
What might happen: Reserve shares drift lower over years; other buyers absorb most Treasury supply with modest yield effects.
What would need to be true: Alternatives slowly gain depth; domestic demand fills gaps.
Evidence that would support it: A slow, persistent COFER decline not explained by exchange-rate valuation.
Faster diversification
What might happen: Quicker reductions could put more pressure on the dollar and on auction yields.
What would need to be true: A credible, liquid alternative and a clear reason to move quickly.
Evidence that would support it: Weaker auction demand, sustained foreign net selling in TIC, and dollar weakness together.
Signals to watch
We list where to check each signal. Values will appear only after they are checked against the official source.
| Signal | Where to check it |
|---|---|
| Dollar share of official reserves | IMF COFER |
| Foreign holdings and net purchases of Treasuries | U.S. Treasury TIC |
| Auction results (bid-to-cover, accepted yields) | TreasuryDirect |
| Treasury yields | U.S. Treasury daily yield curve |
| Trade-weighted dollar index | Federal Reserve H.10 |
A change in a reserve share or in reported holdings does not by itself prove a sudden exodus. Exchange-rate moves change reported values, and holdings held through custodians in other countries can be hard to attribute.