What is Interest Arbitrage?

Switching into another currency by buying spot and selling forward, and investing proceeds in order to obtain a higher interest yield. Interest arbitrage can be inward, i.e. from foreign currency into the local one or outward, i.e. from the local currency to the foreign one. Sometimes better results can be obtained by not selling the forward interest amount. In that case some treat it as no longer being a complete arbitrage, as if the exchange rate moved against the arbitrageur, the profit on the transaction may create a loss.

What is Interest Parity?
One currency is in interest parity with another when the difference in the interest rates is equalized by the forward exchange margins. For instance, if the operative interest rate in Japan is 3% and in the UK 6%, a forward premium of 3% for the Japanese Yen against sterling would bring about interest parity.

What is Interest Rate Swaps?
An agreement to exchange interest rate exposures from floating to fixed or vice versa. There is no swap of the principal. The principal amount is notional as at the end of the tenure only cash flows related with the interest payments (whether payment or reciept) are exchanged.

What is Intervention?
Action by a central bank to effect the value of its currency by entering the market. Concerted intervention refers to action by a number of central banks to control exchange rates.

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