This is quite an interesting point. After covering the topic about Covered Interest Parity Lost, I recalled that Cross-currency basis swaps actually exchange notionals (at maturity) based on the initial spot rate (and not the prevailing spot rate at maturity).The study notes say that "The overall high interest rates paid are expected to be offset by the gain on the notional exchange at the maturity of the contract, and this expected gain on exchange of notional leads to a significant exposure for the payer of the high interest rate." I don't understand why they are expecting a gain in this transaction? Aren't they just receiving back the initial currency exchange and doesn't the gain depend on what the FX rates are at the end of the transaction?