What makes a currency pair a "major"?
Thousands of currency pairs can be quoted. A handful carry nearly all the volume. The market's informal name for that handful is the majors, and knowing what puts a pair in the club tells you most of what you need to know about how it will behave.
The list
There is no official register, but almost every desk would name these seven:
- EUR/USD — euro / US dollar
- USD/JPY — US dollar / Japanese yen
- GBP/USD — British pound / US dollar ("cable")
- USD/CHF — US dollar / Swiss franc ("swissie")
- AUD/USD — Australian dollar / US dollar ("aussie")
- USD/CAD — US dollar / Canadian dollar ("loonie")
- NZD/USD — New Zealand dollar / US dollar ("kiwi")
Notice the pattern immediately: every single one contains the US dollar. That is not a coincidence, and the final lesson of this unit is entirely about why.
EUR/USD alone accounts for roughly a fifth of all global FX turnover — one pair, out of thousands, carrying that share.
What actually earns the status
A currency reaches this tier through a combination of properties, not size alone:
- A large economy behind it, generating continuous real trade flows in both directions.
- Free convertibility. No capital controls, no permission needed to move money in or out. This one is decisive — several very large economies are absent from the majors purely because their currency is not freely tradeable.
- A deep domestic interest-rate market. Currency trading rests on borrowing and lending both currencies, so a liquid local money market is a prerequisite for a liquid currency.
- Credible, predictable institutions. A central bank whose framework participants can model, and a legal system in which contracts settle as written.
Add "the world already trades it" and you have a self-reinforcing loop: liquidity attracts liquidity, because the cheapest place to trade is wherever everyone else already is.
What that buys you as a reader of prices
The consequences are practical and measurable:
- The tightest spreads in the market. Fractions of a pip in wholesale size.
- Depth at size. Large amounts can trade without the price moving much — the property that actually defines liquidity, rather than volume alone.
- Continuous quoting. A major has a live two-way price essentially every minute the market is open, in every centre.
- The deepest data history. Decades of clean records, which is why every study, backtest and textbook example uses these pairs.
A worked comparison
Consider the same $10 million transaction in two pairs, using illustrative spreads:
- EUR/USD at 0.8 pips: the round-trip spread cost is roughly $800.
- A thinly traded pair at 25 pips on a comparable price level: the same trade costs tens of thousands — and may not fill at one price at all.
Same market, same day, same size. The difference is entirely who else is standing there willing to quote. That is what "liquidity" means in cash terms, and it is why the majors are the reference point against which every other pair is described.
In the data
Nothing in the data marks a pair as major. The first rows of the currency list are below: the dirham against the dollar, the Australian dollar and the Canadian dollar, each labelled simply as a currency, exactly as euro-dollar is further down.
The majors-and-minors split is a market convention that whoever builds a list has to apply themselves, which is why two vendors' "major pairs" lists rarely match exactly.
Try it now
- Three of the seven majors are below, a month of daily candles each. Measure the same session on all three and convert each range to pips — remembering that the yen pair counts two decimals and the others four.
- Compare the three. They are not interchangeable: the pip counts differ because the quote conventions differ, and the percentages differ because the currencies do. Write down which of the three moved most in percentage terms, and whether that would have been your guess.
- Say the pattern out loud: every major contains the US dollar. Then hold the question until the last lesson of this unit, which explains why the market organised itself that way.