Forward FX / Currency Forwards — Locking In a Future Rate Now
Suppose there is an exporter who will receive dollar payment in three months. If the exchange rate falls in the meantime, it is a loss—so how can they nail down the future rate 'now'? That tool is the forward FX.
What is a forward FX?
A forward FX (currency forward) is 'a promise to exchange currency on a specific future date at a rate decided today.'
For example, suppose there is an exporter scheduled to receive $1 million in three months. They do not know what the exchange rate will be in the meantime. If the won–dollar rate falls, converting to won means a loss.
If at this point they make a forward contract with a bank—'in three months I will sell dollars at $1 = X won'—they can convert at the pre-set value no matter what the future rate turns out to be. It eliminates the uncertainty today.
A forward FX is a 'over-the-counter (OTC)' contract made one-on-one with a bank rather than on an exchange, so the amount and maturity can be set to fit your needs.
How is the forward rate determined
The forward rate is not a 'prophecy about the future exchange rate.' By the interest rate parity (IRP) we saw earlier, it is calculated mechanically from the interest-rate gap between the two countries.
Formula: forward rate = spot rate × (1 + domestic rate) / (1 + foreign rate)
The high-rate currency is priced low in the forward (discount), and the low-rate currency is priced high (premium). This must be so for the balance to hold that 'whichever currency you put money into, if hedged, the return is the same.'
In other words, the 'premium' or 'discount' attached to a forward is merely a reflection of the interest-rate gap, not a value attached because the market guessed the future direction of the exchange rate.
The forward as a hedging tool — and its cost
The biggest use of a forward FX is 'eliminating exchange-rate risk.' Funds and ETFs that invest in overseas stocks or bonds use these forwards to eliminate exchange-rate fluctuations (currency hedging).
But it is not free. There are two costs.
First, the 'hedging cost' that comes from the interest-rate gap. If the domestic rate is lower than the foreign rate, a cost equal to that difference tends to arise when hedging.
Second, the 'opportunity loss.' When the exchange rate moves in your favor (e.g., when the won weakens and dollar-asset value rises), if you had a hedge on you miss out on that gain.
That is why it is accurate to view a forward hedge not as 'a tool to increase profit' but as 'a tool to reduce uncertainty.' This is also why this site shows the exchange-rate effect separately.
Frequently Asked Questions
Q. Are a forward FX and a futures contract the same thing?
Similar but different. A forward is an OTC contract made one-on-one with a bank, so the amount and maturity can be set freely, and the currency is actually exchanged at maturity. A currency futures contract is traded on an exchange in a standardized form and is settled (margined) daily. The currency-hedge products individual investors encounter mostly use forwards and currency swaps.
Q. Can individuals also currency-hedge with forwards?
It is not easy for an individual to make a forward contract directly with a bank, but if you buy a 'currency-hedged (H)' fund or ETF, the asset manager manages the exchange-rate risk with forwards on your behalf. However, the hedging cost can eat into returns, and when the won weakens, going unhedged can actually be more advantageous, so the choice varies by situation.
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