FX spread explained: what it is and why it matters to investors

If someone has ever exchanged Canadian dollars for U.S. dollars, purchased a U.S.-listed investment, or compared exchange rates, the FX spread may have affected the final rate received. An FX spread is the difference between the price at which a currency can be bought and the price at which it can be sold.

In foreign exchange, or forex, currencies are exchanged in pairs. The spread represents the difference between the buying and selling prices available for a particular currency transaction. While the spread may appear small, it can influence the overall cost of converting one currency into another.

FX spreads are relevant across many types of transactions, including international travel, online purchases, investing, and forex trading. Whether someone exchanges money at a currency exchange booth or converts funds through a brokerage account, the spread may affect the exchange rate available for the transaction.

This article explains how FX spreads work, the role of bid and ask prices, how spreads may affect currency conversion costs, and what investors may consider when comparing foreign exchange costs.

What does a spread in forex mean?

The term "FX" stands for foreign exchange, which refers to the global marketplace where currencies are bought and sold. A spread is the difference between two prices. In the context of currency markets, that difference is typically the gap between the bid price and the ask price.

Every currency pair has two prices. One represents the price at which a participant can sell a currency, while the other represents the price at which a participant can buy it. The difference between those two prices is known as the spread in forex.

The FX spread can represent part of the cost associated with converting currencies or executing FX trades. Rather than appearing as a separate fee, the spread may be reflected directly in the exchange rate offered to the customer.

Different providers may present FX-related costs in different ways. Some may incorporate costs into the exchange rate itself, while others may apply additional fees or charge commissions separately. As a result, the spread structure used by one provider may differ from that of another.

Because FX pricing can vary depending on the provider, currency pair, transaction size, and market environment, understanding the spread can provide useful context when reviewing currency conversion or trading costs.

How bid and ask prices work in foreign exchange

To understand the bid-ask spread, it helps to understand the two prices that appear in a foreign exchange quote.

The bid price is the price at which a currency can be sold. The ask price is the price at which a currency can be bought.

These two prices exist simultaneously in the forex market. The difference between them is known as the bid-ask spread or FX spread.

For example, suppose the EUR/USD currency pair is quoted as:

• Bid: 1.3500

• Ask: 1.3520

The spread is calculated using the following formula:

FX spread = Ask price − Bid price

In this example:

• 1.3520 − 1.3500 = 0.0020

This difference is typically measured in pips, a common unit used in trading forex to describe small price movements.

The spread represents the difference between the buy and sell prices available at a given moment. A wider spread means there is a larger gap between the two prices. A narrower spread means the gap is smaller.

In many financial markets, spreads can fluctuate throughout the day. Factors such as market liquidity, trading volume, and changing market conditions may influence how spreads are priced.

When reviewing a quote on a trading platform, investors may notice that the displayed buy and sell prices differ slightly. That difference is the spread.

FX spread example: converting CAD to USD

A practical example can help illustrate how an FX spread may affect a currency conversion.

Imagine a Canadian investor wants to convert Canadian dollars into U.S. dollars to purchase a U.S.-listed stock or exchange-traded fund (ETF).

A displayed market exchange rate may differ from the rate available through a specific provider. The rate offered for the transaction may include an FX spread.

Consider a simplified example:

• Bid rate: 1.3500

• Ask rate: 1.3520

The difference between those two prices is 0.0020.

If the investor is converting CAD to USD, the exchange rate applied to the transaction may affect how many U.S. dollars are ultimately received. Even small differences in pricing can influence the final conversion amount.

For example, if two providers offer different spreads, the resulting amount of converted currency may differ, even if both transactions occur at approximately the same time.

Actual exchange rates and spreads can vary depending on several factors, including:

• The currency pair

• Current market conditions

• The provider involved

• Transaction size

• Time of day

• Transaction type

Because foreign exchange pricing can change throughout the trading day, available rates may differ from one moment to another.

Is an FX spread the same as a currency conversion fee?

An FX spread and a currency conversion fee are related concepts, but they are not always the same thing.

An FX spread refers to the difference between the buy and sell prices of a currency. A currency conversion fee may be a separate charge applied when converting one currency into another.

Some providers may incorporate FX-related costs into the exchange rate through the spread. Others may apply a separate fee in addition to the exchange rate. In some cases, a combination of both approaches may be used.

When evaluating currency conversion costs, it can be useful to consider the total cost of the transaction rather than focusing on a single component.

Several terms are often discussed together:

FX spread

The difference between buy and sell prices.

Currency conversion fee

A separate charge that may apply when exchanging one currency for another.

Commission

A transaction-related fee that may apply separately from currency conversion.

Exchange rate markup

A difference between a reference exchange rate and the rate offered to a customer.

Because providers can structure pricing differently, FX costs may not always appear in the same format. Reviewing how pricing is presented such as checking Questrade’s specific transaction cost schedule can help provide a clearer picture of potential transaction cost considerations and any potential hidden costs associated with a conversion.

Why do FX spreads change?

FX spreads are not always constant. They can vary depending on market activity and pricing conditions.

One factor is market liquidity. Highly traded currencies often experience greater activity, which can contribute to tighter spreads. Less frequently traded currencies may experience a wider spread.

Major currency pairs, such as EUR/USD, often benefit from high liquidity and significant trading volume. By contrast, less commonly traded pairs may have different pricing characteristics.

Other factors that may influence spread changes include:

• Market volatility

• Time of day

• Trading hours

• Provider pricing models

• Transaction size

• Current market demand

During periods of increased uncertainty or rapid price movement, spreads may widen. During periods of stable trading activity, spreads may narrow.

Some providers may use fixed spreads, while others may use floating spreads or a variable spread model. Under a floating spread model, spread values can change in response to market activity.

Because pricing structures vary, available spreads may differ across providers and products.

How to compare FX costs before converting currency

When comparing FX costs, several factors may be worth reviewing.

The exchange rate offered for a transaction can be one consideration. Some providers may include costs within the exchange rate itself, while others may display separate fees.

Other considerations may include:

• The exchange rate available for the transaction

• Whether a separate currency conversion fee applies

• Whether a commission applies to the related trade

• The size of the spread

• Whether the quoted rate can change before execution

• How the provider explains its conversion process

Some investors may focus only on visible fees. However, FX-related costs can be presented in different ways.

For this reason, reviewing the overall transaction structure may provide a more complete understanding of the costs involved. Looking at exchange rates, spreads, commissions, and any other applicable charges together can help create a fuller picture of the conversion process.

Common misconceptions about FX spreads

Several misconceptions can create confusion around FX spreads.

"The exchange rate seen online is always the rate received"

Publicly displayed exchange rates may differ from transaction rates offered by a provider. The available rate may include an FX spread or other pricing adjustments.

"An FX spread is always listed as a fee"

An FX spread may not appear as a separate line item. Instead, it may be incorporated into the exchange rate itself.

"No commission means no currency conversion cost"

Even when a provider does not charge commissions, FX-related costs may still be reflected through spreads or exchange rate pricing.

"All providers calculate FX costs the same way"

Different providers may use different pricing structures, spread models, and fee arrangements.

"FX spreads only matter to forex traders"

While FX spreads are an important concept in forex trading, they can also affect everyday currency conversions, investment transactions, and international purchases.

Summary of FX spreads in Canada

FX spreads are a common part of foreign exchange transactions and can influence the cost of converting one currency into another. Whether someone is exchanging funds for travel, purchasing U.S.-listed investments, or comparing exchange rates, understanding how spreads work can provide useful context. By recognizing the relationship between bid and ask prices, currency conversion fees, and overall transaction costs, investors can develop a clearer understanding of how foreign exchange pricing may affect different financial activities.