Interest Rate Swaps - Fundamentals › Limitations and Practical Considerations

While swaps are powerful risk management tools, they come with important limitations and risks that you must understand.

The most significant risk in swap transactions is counterparty credit risk: the possibility that the other party will default on their obligations. This risk is asymmetric, since only the party with a positive market value on the swap (the "in-the-money" party) faces exposure. A swap can be an asset to one party and a liability to the other, and these positions can flip as interest rates move.

Central clearing has substantially mitigated this risk for standardized swaps. When a swap is cleared, the central counterparty (CCP) becomes the counterparty to both original parties, guaranteeing performance. The CCP manages risk through initial margin requirements, daily variation margin calls, and default funds contributed by clearing members. However, uncleared swaps, particularly customized contracts, still carry bilateral counterparty risk.

When using swaps to hedge, the hedge may not perfectly match the underlying exposure. This basis risk can arise from several sources. The floating rate on the swap might not exactly match the floating rate on the hedged liability. A company hedging SOFR-based loans with a swap might find that its loan resets on different dates than the swap, or uses different calculation methods. Additionally, the notional amount of the hedge might not perfectly match the exposure, or the hedge might have different payment dates than the underlying.

While the swap market is generally liquid for standard tenors (1, 2, 3, 5, 7, 10, and 30 years) in major currencies, liquidity can deteriorate during market stress. In 2008 and again in March 2020, bid-ask spreads widened dramatically, and some counterparties pulled back from market-making. This can make it difficult to exit or adjust positions precisely when hedging is most needed.

The post-crisis regulatory environment has added significant complexity to swap transactions. Reporting requirements, margin rules, and clearing mandates require sophisticated operational infrastructure. The ISDA documentation framework, while standardized, is lengthy and requires legal expertise to interpret. For smaller market participants, these costs can make swaps less accessible.

The transition from LIBOR to SOFR created substantial operational challenges. Legacy contracts referencing LIBOR had to be amended, and the economic impact of the spread adjustment between LIBOR and SOFR was large for some portfolios. While the transition is largely complete, it is a reminder that "permanent" market conventions can change, requiring flexibility in systems and documentation.