Foreign Exchane Option

In finance, a foreign exchange option (commonly shortened to just FX option or currency option) is a derivative financial instrument where the owner has the right but not the obligation to exchange money denominated in one currency into another currency at a pre-agreed exchange rate on a specified date; see Foreign Exchange derivative.

The FX options market is the deepest, largest and most liquid market for options of any kind in the world. Most of the FX option volume is traded OTC and is lightly regulated, but a fraction is traded on exchanges like the International Securities Exchange, Philadelphia Stock Exchange, or theChicago Mercantile Exchange for options on future contracts. The global market for exchange-traded currency options was notionally valued by the Bank for International Settlements at $158,300 billion in 2005

Corporations primarily use FX options to hedge uncertain future cash flows in a foreign currency. The general rule is to hedge certain foreign currency cash flows with forwards, and uncertain foreign cash flows with options.

Suppose a United Kingdom manufacturing firm is expecting to be paid US$100,000 for a piece of engineering equipment to be delivered in 90 days. If the GBP strengthens against the US$ over the next 90 days the UK firm will lose money, as it will receive less GBP when the US$100,000 is converted into GBP. However, if the GBP weaken against the US$, then the UK firm will gain additional money: the firm is exposed to FX risk. Assuming that the cash flow is certain, the firm can enter into a forward contract to deliver the US$100,000 in 90 days time, in exchange for GBP at the current forward rate. This forward contract is free, and, presuming the expected cash arrives, exactly matches the firm's exposure, perfectly hedging their FX risk.

If the cash flow is uncertain, the firm will likely want to use options: if the firm enters a forward FX contract and the expected USD cash is not received, then the forward, instead of hedging, exposes the firm to FX risk in the opposite direction.

Using options, the UK firm can purchase a GBP call/USD put option (the right to sell part or all of their expectedpounds sterling at a predetermined rate), which will: income for

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  protect the GBP value that the firm will receive in 90 day's time (presuming the cash is received)
  
  
  
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  cost at most the option premium (unlike a forward, which can have unlimited losses)
  
  
  
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  yield a profit if the expected cash is not received but FX rates move in its favor