Direct answer
An extra letter after a forex currency pair symbol usually does not create a different currency “pair.” Instead, it typically labels a specific instrument variant, such as a particular contract specification, trading venue convention, or quote/settlement method. Because symbol conventions are not universal across all exchanges and platforms, the exact meaning of the letter must be confirmed in that venue’s instrument or product documentation.
Explanation of how it works
In forex, a “pair” like EUR/USD identifies the two currencies being exchanged. Some venues add a trailing letter to the displayed symbol. Common reasons include:
- Instrument variant labeling: the letter may distinguish different contract types for the same underlying currencies (for example, different expiries or settlement styles).
- Trading/quote convention: the letter may indicate how prices are presented or how the instrument is defined.
- Venue-specific naming rules: each exchange, clearing organization, or broker-facing platform can apply its own symbol format.
So, “an additional letter after a pair” is best treated as a metadata tag for an instrument, not a guarantee of a particular market structure by itself.
Example or checks you can do
If you see a symbol with an extra letter, verify its meaning using an independent check:
- Open the instrument details on the venue/platform where you saw the quote.
- Look for product specifications such as contract size, settlement method, and any listed “symbol conventions.”
- Compare listings: confirm whether the same currency pair appears with and without the letter, and whether the details differ.
This approach works even when you are researching “exotic” currency pairs, because the key is still the venue’s own symbol rules.
Limitations and what to keep uncertain
- No single universal rule: the letter’s meaning can vary by exchange or platform.
- No guaranteed interpretation from the symbol alone: without the venue’s instrument specification, you cannot reliably infer settlement, contract structure, or how the instrument behaves.
- Time and product changes: venues may update naming conventions and contract descriptions, so re-checking the instrument details is important for accuracy.
How to summarize it for decision-making
If your question is specifically “what forex exchanges have an additional letter after a pair,” the bounded answer is: many venues can use symbol letters for instrument variants, but the letter’s definition is exchange-specific. The correct way to identify which exchanges use it is to check each venue’s instrument naming or product specification for that pair symbol you are examining.