The 8 Major Currencies and What Drives Each One

Almost all forex trading volume flows through a handful of currencies. Understanding what moves each of them is the difference between reacting to price and actually anticipating it. Every currency is, in effect, a claim on an economy and its central bank, so the same forces show up again and again: interest rates, inflation, growth, trade balances, and how nervous investors feel about the world.

This guide walks through the eight majors: the US dollar (USD), euro (EUR), British pound (GBP), Japanese yen (JPY), Swiss franc (CHF), Australian dollar (AUD), Canadian dollar (CAD), and New Zealand dollar (NZD). For each, we cover the central bank that sets policy, the key data to watch, and the unique drivers that give it character. Numbers used below are illustrative examples, not forecasts.

The Common Thread: Interest Rates and Central Banks

Before the individual profiles, one idea underpins everything: currencies tend to strengthen when their central bank raises interest rates (or is expected to) and weaken when rates are cut. Higher rates attract capital seeking better returns and can cool inflation. This is why traders obsess over central bank meetings, the language in policy statements, and inflation data such as the Consumer Price Index (CPI), which measures how fast prices are rising.

A useful mental model is the interest rate differential, the gap between two countries' rates. A pair like AUD/JPY often moves on the difference between Australian and Japanese rates, not just one side. This gap is also the engine behind the carry trade, where traders borrow a low-yielding currency to hold a higher-yielding one and collect the difference.

The Eight Majors at a Glance

USD: The World's Reserve Currency

The US dollar sits on one side of most traded pairs and serves as the global reserve currency, used for pricing commodities like oil and held widely by central banks. Its policy is set by the Federal Reserve (Fed). When the Fed signals higher rates, the dollar typically firms across the board, pressuring EUR/USD lower and pushing USD/JPY higher.

Key releases include Nonfarm Payrolls (monthly US job creation), CPI, and the FOMC meetings where rate decisions are made. The dollar also behaves as a safe haven: in times of global stress, investors buy dollars for safety even when the crisis originates in the US itself. That dual role, growth-sensitive yet defensive, makes the USD unusually complex.

EUR: A Bloc, Not a Country

The euro represents 20 member economies, with policy set by the European Central Bank (ECB). Because it spans many countries, traders watch bloc-wide inflation and Purchasing Managers' Indexes (PMIs, surveys of business activity), plus the health of major members like Germany. EUR/USD is the most liquid pair in the world, so it often reflects the broad USD story as much as the euro's own.

EUR can weaken when growth in the eurozone lags the US, widening the rate gap in the dollar's favor. Political events and the spread between member states' government bond yields can also weigh on the currency.

GBP: Inflation-Sensitive and Headline-Prone

The pound is governed by the Bank of England (BoE). Sterling tends to be highly sensitive to UK inflation and wage growth, since these shape how aggressively the BoE moves. Traders watch CPI, average earnings, and the voting split at BoE meetings, where members individually vote to hold, hike, or cut.

GBP can also swing sharply on domestic political and fiscal news, such as government budgets. Because liquidity in GBP pairs is thinner than in EUR/USD, moves in GBP/USD (nicknamed "cable") can be quicker and larger.

JPY: The Safe-Haven Funding Currency

The yen is unique because the Bank of Japan (BoJ) kept interest rates extremely low for decades to fight persistent low inflation. That made the yen the classic funding currency for carry trades: borrow cheap yen, buy higher-yielding currencies. When markets are calm, this pushes pairs like AUD/JPY up; when fear spikes, traders unwind those trades and the yen surges as a safe haven.

Watch Japanese CPI, any shifts in the BoJ's yield policy, and the risk of intervention, where authorities buy yen directly to slow a sharp fall. USD/JPY is especially driven by the US-Japan rate differential.

CHF: Stability and the SNB's Hand

The Swiss franc is a safe haven backed by a stable economy and low inflation, overseen by the Swiss National Bank (SNB). In periods of stress, capital flows into CHF, strengthening pairs like moving USD/CHF lower.

The SNB is known for actively managing the franc, and has historically intervened or used negative rates to prevent excessive strength that would hurt Swiss exporters. Traders should respect that intervention risk, since it can cap or reverse otherwise strong CHF trends.

The Commodity Currencies: AUD, CAD, NZD

These three are grouped together because their economies lean heavily on exporting raw materials, so their currencies track commodity prices and global risk appetite.

AUD: China and Metals

The Australian dollar, set by the Reserve Bank of Australia (RBA), is tied to industrial metals like iron ore and to demand from China, Australia's largest trading partner. Strong Chinese data or rising metal prices often lift AUD/USD. As a risk-on currency, the Aussie tends to rise when markets are optimistic and fall when they turn defensive.

CAD: The Oil Link

The Canadian dollar, guided by the Bank of Canada (BoC), moves closely with crude oil prices, since energy is a major Canadian export. Rising oil can strengthen CAD, pulling USD/CAD lower. Because Canada trades so heavily with the US, CAD is also sensitive to the US economy and the Fed, not just the BoC.

NZD: Dairy and Yield

The New Zealand dollar, managed by the Reserve Bank of New Zealand (RBNZ), is influenced by soft commodities, especially dairy exports, and by New Zealand's relatively high interest rates, which have made it a popular carry destination. NZD often trades in sympathy with AUD, given their linked economies and shared exposure to Asian demand.

Putting It Together

Most major moves come down to a few questions: Which central bank is turning more hawkish (leaning toward higher rates) or dovish (leaning toward cuts)? Is the market in a risk-on or risk-off mood? And where is money flowing for safety or yield?

You can track much of this with common tools: an economic calendar for upcoming data and central bank meetings, positioning data such as the Commitment of Traders (COT) report to gauge how large speculators are leaning, currency-strength readings to see which currencies are leading, and bond-yield comparisons to visualize rate differentials driving the carry trade.

Key Takeaways

• Every major currency is driven first by its central bank's rate path, then by inflation, growth, and risk sentiment.
• The USD, JPY, and CHF act as safe havens, gaining when global markets turn fearful, though the USD is also growth-sensitive.
• The JPY is the classic carry funding currency due to long-standing ultra-low rates, so it surges when carry trades unwind.
• AUD, CAD, and NZD are commodity currencies: AUD tracks metals and China, CAD follows oil, and NZD leans on dairy and yield.
• Interest rate differentials between two economies often explain a pair's direction better than either currency alone.
• Use an economic calendar, COT positioning, currency-strength, and bond-yield tools to monitor these drivers, and remember none of this is a guarantee of future moves.