Learn what a swap is, how notional principal works, and why firms use swaps to alter interest-rate, currency, or credit exposure.
A swap is a derivative contract in which two parties agree to exchange sets of cash flows according to a defined formula.
The most common examples are:
In most cases, the parties are not swapping ownership of an asset in the ordinary sense. They are swapping exposure.
A swap is built around a notional amount, payment dates, and a rule for calculating what each side owes.
The notional principal amount is usually used only to calculate payments. It is often not physically exchanged.
That is why a swap can create very large economic exposure even when little or no principal changes hands.
In an interest rate swap, one party may pay fixed and receive floating, while the other does the opposite.
This lets firms reshape their rate exposure without refinancing the underlying debt itself.
In a currency swap, the parties exchange cash-flow obligations tied to different currencies. This can help firms manage funding or exchange-rate exposure.
A credit default swap (CDS) transfers exposure to credit events such as default or restructuring.
Swaps are often used to:
This is why swaps are common in corporate treasury, banking, and institutional asset management.
Suppose Company A has floating-rate debt but wants payment stability. Company B has fixed-rate debt but expects rates to fall.
Through a swap:
Neither company necessarily changes the legal terms of its original borrowing. The swap changes the economic exposure layered on top.
Swaps can reduce one risk while introducing or concentrating another.
Key risks include:
This is why swaps are powerful but not simple.