USD
USD is the U.S. dollar; it is a currency and global funding unit, while DXY is only one index that tracks the dollar against a specific basket.
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The Dollar Often Acts as a Vehicle Currency in Global FX
A currency can sit at the center of FX market routing even when the ultimate economic exposure is between two non-U.S. currencies or institutions.
What it is
A vehicle currency is a widely traded intermediary used to exchange between other currencies. The BIS identifies the U.S. dollar as the dominant vehicle currency because it appears on one side of most global FX transactions and in the most heavily traded currency pairs.
Why it matters
High dollar turnover reflects market structure as well as direct U.S. trade or investment exposure. The transaction route and the underlying economic exposure are not always the same thing.
Example
Two institutions managing exposures in different non-U.S. currencies may use liquid dollar pairs as the practical bridge between them.
Common mistake
Assuming every FX trade containing USD represents a direct commercial transaction with the United States.
What to watch
- currency-pair liquidity
- vehicle-currency usage
- bid-ask spreads
- market depth
- underlying economic exposure
Key takeaway
Separate the currency used to route an FX trade from the economic exposure that motivated the trade.
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Related cards
Sources
Bank for International Settlements · Federal Reserve Board
Educational and informational purposes only. Not investment advice.