Understanding Currency Pairs: Majors, Minors and Exotics
Every forex quote is a relationship between two economies. Learn how pairs are quoted, why the majors dominate liquidity, and what changes when you trade minors and exotics.
Read moreOf all the forces that move exchange rates, few are as powerful — or as closely watched — as central bank interest-rate decisions. A single sentence in a policy statement can reprice a currency across every market in seconds. Understanding why requires looking beyond the headline rate to the expectations, guidance and flows that sit behind it.
Why interest rates matter to currencies
An interest rate is the return on holding a currency. When a central bank raises its policy rate, deposits, bills and bonds denominated in that currency tend to offer higher yields, which can attract international capital. When it cuts, the relative return falls. Currencies therefore respond not to a country's rate in isolation but to the interest-rate differential between two economies — and, more precisely, to how that differential is expected to evolve.
Real rates matter as well. A 5% policy rate with 6% inflation offers a negative real return; a 3% rate with 1% inflation offers a positive one. Over time, markets tend to reward currencies whose real yields are rising relative to their peers.
Expectations: why "priced in" is everything
Markets are forward-looking. Long before a meeting, money-market instruments such as overnight index swaps and interest-rate futures embed the probability of each possible outcome. By decision day, the widely expected result is usually reflected in the exchange rate already.
What moves the currency is the surprise — the gap between what was priced and what was delivered. A central bank that raises rates exactly as expected but signals that it is finished tightening can see its currency fall. A bank that holds rates unchanged but warns that inflation is stubborn can see its currency rise. The decision is only one part of the message.
Currencies do not react to what a central bank does. They react to what it does relative to what the market expected — and to what it says about next time.
The anatomy of a decision day
The rate announcement
The headline decision is released at a pre-announced time. Liquidity can thin in the minutes beforehand as participants reduce exposure, and spreads may widen sharply at the moment of release.
The statement and forward guidance
Changes in wording — "further increases may be needed" becoming "the committee will assess incoming data" — are parsed line by line. Forward guidance is a policy tool in its own right: by shaping expectations for future rates, a central bank can influence financial conditions without moving its rate at all.
Projections, votes and the press conference
Several central banks publish economic projections alongside certain decisions. The US Federal Reserve's quarterly Summary of Economic Projections includes the so-called "dot plot" of officials' rate expectations. The Bank of England publishes how each Monetary Policy Committee member voted. Press conferences can then add nuance — or volatility — as the governor or chair answers questions in real time.
Balance-sheet policy and intervention
Beyond the policy rate, central banks can expand or shrink their balance sheets (quantitative easing or tightening), which affects longer-term yields and liquidity. Some authorities also intervene directly in currency markets. Japan's authorities, for example, bought yen in 2022 and again in 2024 to counter rapid depreciation — a reminder that official action can override prevailing trends.
The central banks that matter most for FX
| Central bank | Policy body | Scheduled policy decisions | Inflation objective |
|---|---|---|---|
| Federal Reserve (US) | Federal Open Market Committee | 8 per year | 2% (PCE), alongside maximum employment |
| European Central Bank | Governing Council | 8 per year (every six weeks) | 2% over the medium term, symmetric |
| Bank of England | Monetary Policy Committee | 8 per year | 2% CPI |
| Bank of Japan | Policy Board | 8 per year | 2% price stability target |
| Bank of Canada | Governing Council | 8 per year | 2%, the midpoint of a 1–3% range |
| Swiss National Bank | Governing Board | 4 per year (quarterly) | CPI inflation of less than 2% |
Schedules and frameworks are set by each institution and may change; always confirm dates on the official central bank website or a live economic calendar.
How rate decisions transmit through currency pairs
- Direct pairs — a hawkish surprise from the ECB tends to lift EUR/USD, EUR/GBP and EUR/JPY simultaneously.
- Relative divergence — the strongest trends often emerge when two central banks move in opposite directions, widening the differential between them.
- Carry dynamics — wide differentials encourage "carry" positions, borrowing in low-yielding currencies to hold higher-yielding ones. These positions can unwind abruptly when volatility rises, producing sharp moves in the funding currency.
- Cross-asset spillovers — US policy in particular affects global bond yields, equity markets and commodities, which feed back into currencies worldwide.
Managing risk around central bank events
Decision days offer opportunity, but they also concentrate risk. Prices can gap through stop-loss orders, spreads can widen well beyond normal, and an initial move can reverse completely during the press conference. Prudent practice includes knowing the exact time of every relevant decision, reducing position size or standing aside ahead of high-impact releases, avoiding stops placed at obvious round numbers where slippage is likely, and waiting for liquidity to normalise before acting on the reaction.
Central bank policy is the single most important macro variable in currency markets. Following the calendar, understanding what is priced in and reading the guidance carefully will not remove uncertainty — but it will ensure that decisions are made with a clear view of the forces most likely to move the market.
This article is published by OT PMC Research for general education and information only. It does not constitute investment advice, a recommendation or an offer to buy or sell any financial instrument, and it does not take account of your objectives, financial situation or needs. Figures labelled "illustrative" or "example" are hypothetical.