Interest Rate Swap
A bilateral OTC derivative contract in which two counterparties agree to exchange periodic interest payments on a notional principal amount — typically exchanging a fixed rate for a floating rate referenced to a benchmark such as MIBOR — used by Indian corporates, banks, and institutions to manage interest rate risk.
An interest rate swap (IRS) is one of the most widely used derivatives globally, with a notional outstanding measured in hundreds of trillions of dollars in international markets. In India, the market is anchored in the overnight indexed swap (OIS), where the floating leg is referenced to the overnight Mumbai Interbank Offer Rate (MIBOR), effectively the RBI repo rate as transmitted through the money market.
The mechanics of a standard Indian OIS are straightforward. Two parties agree on a notional principal (say, Rs 100 crore), a tenor (say, one year), and a fixed rate (say, 6.50% per annum). Party A agrees to pay the fixed rate to Party B. Party B agrees to pay the compounded daily overnight MIBOR rate to Party A. No principal changes hands — only the net interest differential is settled at maturity. If the average overnight MIBOR over the year turns out to be 6.80%, Party A effectively pays 6.50% but receives 6.80%, resulting in a net receipt of 30 basis points on the notional.
From Party A's perspective, this is a pay-fixed, receive-floating swap. A corporate that has issued fixed-rate bonds but expects interest rates to fall might use a pay-fixed swap to synthetically convert its fixed-rate liability into a floating-rate liability, positioning it to benefit from rate cuts. A bank with a large portfolio of floating-rate loans might use a receive-fixed swap to hedge its net interest margin against the risk of falling rates.
The Indian OIS market is concentrated among major commercial banks, primary dealers, foreign banks, and large corporates. CCIL (Clearing Corporation of India Limited) acts as the central counterparty for a large proportion of OIS trades, reducing bilateral credit risk and improving market transparency. SEBI and RBI jointly oversee the market, with RBI having primary jurisdiction over fixed income and currency derivatives given their monetary policy implications.
India also had a MIFOR (Mumbai Interbank Forward Offer Rate) swap market, where the floating leg was referenced to MIFOR — a rate derived from the USD LIBOR plus the forward premium on USD/INR. MIFOR swaps allowed participants to combine interest rate risk management with forex risk exposure. As LIBOR transitioned to risk-free rates globally, Indian market participants adapted by shifting toward SOFR-based benchmarks for USD-linked transactions.
For infrastructure financing, long-dated interest rate swaps (tenors of 5, 10, or even 15 years) allowed project finance borrowers with long-term floating-rate bank loans to swap into fixed rates, providing cash flow certainty critical for project viability calculations and debt service coverage ratio compliance.