Structure of a Currency Swap

A currency swap is an OTC derivative in which two counterparties exchange cash flows in different currencies. In many structures, they exchange principal at the start, make periodic interest payments during the life of the swap, and then re-exchange principal at maturity. The contract allows each party to transform funding or investment exposure from one currency into another without replacing the underlying business objective.

For DFOL purposes, the core task is to separate a currency swap from a plain foreign exchange trade or a simple forward. A spot or forward contract usually handles one exchange date. A currency swap typically manages an ongoing stream of cross-border cash flows.

Core Economic Purpose

Currency swaps are commonly used when one party:

• borrows efficiently in its home currency but needs another currency
• wants to hedge foreign-currency assets, liabilities, or revenues
• wants to change both currency exposure and interest-rate basis at the same time

The swap does not eliminate risk automatically. It reshapes the risk into a form that better matches the party’s balance sheet or cash-flow needs.

Main Structural Components

The essential terms of a currency swap are:

• the two currencies involved
• the notional principal in each currency
• the agreed exchange rate used to size the notionals
• whether principal is exchanged at inception, maturity, or both
• whether each leg is fixed, floating, or one of each
• the payment frequency and day-count convention
• maturity and any early-termination provisions

Unlike a plain interest rate swap, a currency swap often involves actual exchange of principal amounts. That is one of the main structural differences students need to remember.

Typical Cash-Flow Pattern

In a standard fixed-for-floating cross-currency swap:

1. the parties exchange principal amounts at an agreed rate
2. each party pays interest on the currency it has received
3. the principal amounts are exchanged back at maturity

    flowchart LR
	    A["Party A needs USD"] --> B["Initial exchange of CAD for USD"]
	    B --> C["Periodic interest payments in opposite currencies"]
	    C --> D["Final re-exchange of principal"]

This structure is useful when the operating need is ongoing rather than one-time. A corporation with recurring USD obligations, for example, may prefer a swap to a sequence of short-dated FX trades.

Fixed-Fixed, Fixed-Floating, and Floating-Floating

Currency swaps can be organized in several ways:

• Fixed-fixed: both parties pay fixed interest in their respective currencies
• Fixed-floating: one leg is fixed and the other is tied to a benchmark such as CORRA or SOFR
• Floating-floating: both legs reset against benchmark rates

The exam focus is not on memorizing every variant. It is on recognizing why a given structure fits the exposure. If one side wants funding certainty in Canadian dollars and the other wants floating-rate U.S. dollar exposure, a fixed-floating structure may be the best fit.

Example of a Standard Structure

Assume a Canadian borrower can raise CAD efficiently but needs USD funding for a U.S. acquisition. A U.S. borrower has the opposite need.

They enter a currency swap based on:

• CAD notional: C$10,000,000
• USD notional: US$7,400,000
• agreed exchange rate at inception
• Canadian leg: fixed
• U.S. leg: floating

The Canadian borrower delivers CAD and receives USD at inception. During the swap, it pays the U.S. dollar floating leg and receives the Canadian fixed leg. At maturity, the notionals are re-exchanged.

The result is not magic funding. The result is transformed exposure. Each party uses the other side of the contract to change the currency and rate profile of its obligations.

Documentation and Legal Framework

Most OTC currency swaps are documented under an ISDA Master Agreement with:

• a schedule setting relationship-level legal terms
• one or more confirmations describing the specific swap
• a Credit Support Annex if collateral is posted

Students do not need to draft ISDA language, but they should understand why the framework matters. The legal agreement governs payment calculation, close-out, events of default, netting, and collateral mechanics. Without strong documentation, the economic logic of the swap can fail under stress.

Current Benchmark Context

Modern currency swaps often combine currency exposure with benchmark reform issues. In Canadian-dollar floating legs, current market thinking is CORRA-aware, not CDOR-default. In U.S. dollars, the relevant reference framework is SOFR rather than LIBOR.

That does not mean legacy contracts disappeared overnight. It means new analysis should start from current benchmark conventions unless the question clearly identifies a legacy contract that still needs fallback or transition treatment.

Main Risks in the Structure

Even a standard currency swap carries several distinct risks:

• FX risk if the hedge does not match the true underlying exposure
• interest-rate risk on floating legs
• counterparty credit risk in bilateral OTC trading
• settlement risk when principal or coupon payments cross jurisdictions
• liquidity risk if collateral or close-out payments become large
• operational risk if the payment schedule, account details, or benchmark terms are handled poorly

Students should avoid the mistake of focusing only on the initial exchange of principal. The ongoing interest, collateral, and termination mechanics can matter just as much.

Common Pitfalls

• confusing a currency swap with a one-time forward contract
• forgetting that principal may be exchanged in a currency swap
• assuming the swap eliminates all FX exposure even when the underlying cash flows are mismatched
• treating documentation as secondary to pricing
• using outdated benchmark assumptions for modern floating-rate legs

Key Takeaways

• A currency swap exchanges cash flows in two different currencies over time.
• Many structures exchange principal at inception and again at maturity.
• Currency swaps can be fixed-fixed, fixed-floating, or floating-floating.
• The instrument is used to transform funding or hedging exposure, not to create risk-free financing.
• Current Canadian floating-leg analysis should be consistent with modern benchmark conventions.

Sample Exam Question

A Canadian firm has issued fixed-rate CAD debt but expects to generate most of its cash flow in U.S. dollars over the next five years. Which derivative best fits the firm’s need to align debt servicing with its expected foreign-currency cash flow?

• A. A currency swap
• B. A Canadian equity option
• C. A commodity future
• D. A credit default swap

Correct Answer: A. A currency swap

Explanation: A currency swap can transform CAD debt exposure into USD exposure over time by exchanging principal and coupon obligations across the two currencies.