Swaps Explained: Interest Rate and Currency Swaps
After Options Explained: Calls, Puts & the Greeks, the next derivatives question is how firms manage risk when they do not want to change the underlying loan or business cash flows. A swap is an Over-the-Counter (OTC) agreement between two parties to exchange a series of cash flows over a specified period. In interviews, swaps matter because they show how corporates and banks transform interest-rate or currency exposure in a practical treasury setting.
- A swap is an OTC agreement between two parties to exchange a series of cash flows over a specified period.
- Swaps are used to transform the nature of liabilities or assets - e.g., converting floating-rate debt to fixed, or hedging foreign currency exposure.
- Interest Rate Swaps (IRS) are the most common swap.
- In an IRS, Party A pays a fixed rate while Party B pays a floating rate, typically linked to MIBOR/LIBOR/SOFR, on the same notional principal.
- In an IRS, there is no exchange of principal - only net interest payments are exchanged.
- Currency swaps involve exchanging principal and interest payments in different currencies.
- Unlike IRS, principal is exchanged at inception and at maturity in currency swaps.
How Swaps Fit into Risk Management
Swaps are practical risk-management tools that let firms reshape interest-rate or currency exposure without changing the underlying loan or business cash flows. They are used to transform the nature of liabilities or assets - e.g., converting floating-rate debt to fixed, or hedging foreign currency exposure.
OTC means Over-the-Counter: bilateral derivative contracts not exchange-traded. OTC contracts are less transparent and counterparty risk is present. India's IRS and CDS market is OTC.
Tata Motors has a ₹500 Cr floating-rate loan at MIBOR + 150 bps, currently 8%. The CFO expects RBI to hike rates. Tata Motors enters an IRS: pays fixed 9% to swap counterparty, receives MIBOR + 150 bps. Now Tata Motors' effective cost = 9% fixed regardless of rate changes. If MIBOR rises to 8%, Tata Motors saves; if MIBOR falls, it costs more - but certainty is gained.
Interest Rate Swaps
Interest Rate Swaps (IRS) are the most common swap. Party A pays a fixed rate while Party B pays a floating rate, typically linked to MIBOR/LIBOR/SOFR, on the same notional principal.
MIBOR means Mumbai Interbank Offered Rate. It is India's benchmark overnight interbank rate and a reference rate for INR interest rate swaps and floating-rate loans.
There is no exchange of principal in an IRS - only net interest payments are exchanged. This is why an IRS can change the nature of a debt obligation without changing the loan itself.
Uses of Interest Rate Swaps
Indian corporates and banks use IRS to manage how interest-rate movements affect liabilities, trading views, or balance-sheet positioning.
- Convert floating-rate bank loans to fixed-rate obligations, which eliminates interest rate risk.
- Speculation on interest rate direction.
- Asset-liability management by banks, through ALM desks.
Worked Example - Tata Motors IRS
Situation: Tata Motors has a ₹500 Cr floating-rate loan at MIBOR + 150 bps, currently 8%.
Problem: The CFO expects RBI to hike rates.
Framework: Tata Motors uses an IRS to convert floating-rate exposure into a fixed-rate obligation.
Decision: Tata Motors enters an IRS: pays fixed 9% to swap counterparty, receives MIBOR + 150 bps.
Outcome: Tata Motors' effective cost = 9% fixed regardless of rate changes. If MIBOR rises to 8%, Tata Motors saves; if MIBOR falls, it costs more - but certainty is gained.
Learning: The swap transforms interest-rate exposure while keeping the underlying loan in place.
Currency Swaps
Currency swaps involve exchanging principal and interest payments in different currencies. Unlike IRS, principal is exchanged at inception and at maturity.
Currency swaps are used by Indian IT companies such as Infosys, TCS, and Wipro to hedge USD revenue against INR depreciation. They are also used by Indian corporates accessing cheaper overseas debt, ECBs, while needing INR for domestic operations.
Interest Rate Swaps vs Currency Swaps
The key interview distinction is principal exchange. IRS exchanges only net interest payments, while currency swaps exchange both principal and interest payments in different currencies.
This distinction also reflects the risk being managed: interest-rate risk in IRS, and currency exposure in currency swaps.
Structuring a Swaps Explained Interview Answer
"How does a swap help an Indian corporate manage interest rate or currency risk?"
The strongest answers separate the underlying exposure from the swap overlay. Do not say the company changes the loan itself - the swap transforms the nature of liabilities or assets by exchanging cash flows.
The most frequent error is treating an IRS like a currency swap and saying principal is exchanged. In an IRS, there is no exchange of principal - only net interest payments are exchanged, while currency swaps exchange principal at inception and at maturity.
Conclusion
A swap is an OTC agreement to exchange cash flows over a specified period, used to transform the nature of liabilities or assets. For interviews, the core takeaway is simple: IRS helps reshape interest-rate exposure, while currency swaps help manage cash flows in different currencies.