Answer: Interest rate risk

## Explanation In a total return swap (TRS) where the credit protection buyer receives LIBOR plus a spread from the protection seller: - **Credit risk**: The protection buyer is hedged against credit risk because they transfer the credit exposure of the reference asset to the protection seller. - **Market risk**: The protection buyer is hedged against market risk as they receive the total return (including price appreciation/depreciation) of the reference asset. - **Default risk**: The protection buyer is hedged against default risk since the protection seller compensates them for any losses due to default. - **Interest rate risk**: The protection buyer is **NOT** hedged against interest rate risk. While they receive LIBOR plus a spread, this payment is fixed at the outset and doesn't protect them from changes in interest rates that could affect the value of their overall portfolio or other positions. Therefore, the credit protection buyer remains exposed to interest rate risk despite the TRS arrangement.

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