Why Forex Spreads Suddenly Widen During Major Economic Releases

Many beginner traders have experienced this exact frustration: You enter a trade on a major currency pair. The spread is a tight one or two pips. Suddenly, a major economic report is released. The price swings violently, your screen seems to freeze, and that tight spread instantly jumps to five or six pips, hitting your stop-loss before you can even react.

This is not just bad luck. Understanding why this happens requires a look at how the global currency market is built, how interest rates drive capital, and what your broker is actually doing behind the scenes.

The Interbank Reality

Unlike buying shares of a local stock, trading foreign exchange does not happen on a single, centralized exchange. There is no physical location where every transaction is recorded.

Instead, Forex is an “interbank” market. The primary players are the world's largest commercial and investment banks, constantly trading hundreds of millions of dollars with each other. Retail traders do not interact with this interbank network directly; they participate through brokers.

Because there is no central exchange, liquidity—the amount of active buying and selling—depends entirely on who is awake and trading. The market operates 24 hours a day, starting in New Zealand and moving through Asia, Europe, and North America. The deepest liquidity occurs when the London and New York trading sessions overlap. During this multi-hour window, you usually see the tightest spreads on major pairs like the Euro and U.S. Dollar (EUR/USD) or British Pound and Japanese Yen (GBP/JPY).

Why Big News Empties the Market

If liquidity is so deep during the London and New York sessions, why do spreads still break down? The answer comes down to risk and interest rates.

Currencies are fundamentally ruled by global interest rates. Central banks, like the U.S. Federal Reserve or the European Central Bank, raise or lower rates to control inflation. Capital naturally flows toward countries offering higher yields. If a savings account in one country offers 1% and another offers 0.25%, investors want the 1%. At a macroeconomic level, this interest rate differential dictates the flow of global capital across borders.

Most of the time, current interest rates are already priced into the market. What causes massive price swings is a sudden shift in expectations. When a major economic indicator is published—such as the U.S. Non-Farm Payrolls (NFP) or an inflation report—it changes what the interbank market expects a central bank to do next.

In the seconds before these major releases, the big banks pull their orders out of the market to avoid being caught on the wrong side of a surprise announcement. With the major players temporarily stepping back, interbank liquidity simply vanishes.

The Problem With Fixed Spreads

This sudden drop in liquidity exposes a harsh reality for retail traders, especially those using brokers that heavily advertise “fixed” spreads.

In a normal, quiet market, a dealing-desk broker might provide a fixed spread of 2 pips on EUR/USD, though it often internally hovers around 1 or 1.2 pips. However, in the real interbank market, spreads are never truly fixed. They are entirely dependent on real-time supply and demand.

When a major news event like the NFP data is released and interbank liquidity dries up, the real spread expands rapidly. If your broker guarantees a fixed spread, they are acting as a dealer and taking the other side of your trade. During wild market swings, the broker does not want to absorb the financial loss of a rapidly widening interbank spread. To protect themselves, they will simply override the fixed condition, expanding your spread to 5 or 6 pips, or they will reject your order entirely, resulting in a “requote” at a much worse price.

This effect is even more severe if you are trading exotic currency pairs. While major pairs involve highly liquid currencies, exotic pairs match a major currency with a developing market currency, such as the U.S. Dollar and the Mexican Peso (USD/MXN) or the Thai Baht (USD/THB). Exotic pairs naturally have spreads two or three times larger than the majors. During an unexpected event or economic release, exotic spreads can widen so much that trading them becomes prohibitively expensive.

A Practical Takeaway

The foreign exchange market is simply too big for any single participant to control, but you can control when you choose to expose your account to risk.

If you are a beginner, trying to trade directly through a major economic release is generally a losing game. The lack of interbank liquidity and the mechanical widening of broker spreads mean that even if you guess the market direction correctly, the sudden transaction costs or system requotes can quickly ruin your trade.

Check a reliable economic calendar daily to know when interest rate decisions or high-impact data are coming, and adjust your trading schedule accordingly. Furthermore, always review your broker's actual behavior during volatile periods. You can use platforms like WikiFX to check a broker's regulatory background and read real feedback from other traders. If a broker has a long, unaddressed history of freezing platforms or severely manipulating spreads during news events, it is best to find a platform with fairer execution.