Does covered interest parity hold in practice?

CIP held closely before the 2008 financial crisis. Post-crisis, persistent CIP deviations (basis) emerged, particularly in USD crosses, due to regulatory constraints (leverage ratios, G-SIB surcharges) limiting bank arbitrage capital. The CIP basis represents a funding liquidity premium above theoretical no-arbitrage levels.

How is CIP used to derive implied foreign yields?

Given spot rate, forward rate, and domestic interest rate, the implied foreign rate = (1 + r_d) / (F/S) - 1. This synthetic rate is the cost of accessing foreign currency funding via FX swaps rather than the local market, used heavily by corporates and institutional investors in cross-currency borrowing.

Covered Interest Rate Parity Forward Rate

How It Works

Calculate the no-arbitrage forward exchange rate using covered interest rate parity: F = S x (1 + r_d) / (1 + r_f), where the forward rate offsets the interest rate differential between two countries

Each component has a specific meaning:

Covered interest rate parity: F = S x / — The covered interest rate parity: f = s x / recorded for the scenario being assessed.
Where the forward rate offsets the interest rate differential between two countries — The where the forward rate offsets the interest rate differential between two countries recorded for the scenario being assessed.

Note: Interpret the covered interest parity result against the thresholds and context described above.

How to Use

Enter the covered interest rate parity: F = S x /, where the forward rate offsets the interest rate differential between two countries for the scenario you are assessing. Calculate the no-arbitrage forward exchange rate using covered interest rate parity: F = S x (1 + r_d) / (1 + r_f), where the forward rate offsets the interest rate differential between two countries. Use the covered interest parity result to inform your calculation.

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