FX Swaps and Forward Points: Pricing the Forward

Key Takeaways

• Forward points are the difference between the forward rate and the spot rate, driven almost entirely by the interest rate differential between the two currencies, not by any view on future direction.
• An FX swap is two legs booked at once: exchange currencies today at spot, and reverse the exchange on a future date at the forward rate, with the same counterparty.
• Covered interest parity sets the fair forward: the currency with the higher interest rate trades at a forward discount, the lower-rate currency at a forward premium.
• The swap points on an FX swap equal the forward points, so an FX swap is a way to lend one currency and borrow another without taking on net currency risk.

What It Is

Forward points are the number of pips added to or subtracted from the spot rate to get the forward rate for a given settlement date. Dealers quote them directly, for example "plus 54.6 points for three months," rather than restating the full forward price each time.

An FX swap is a single transaction with two legs and no net change in currency exposure. The near leg exchanges two currencies at (or near) spot; the far leg reverses that exchange on a later date at the forward rate. Because you end where you started in currency terms, an FX swap is a funding and liquidity tool, not a directional bet.

The Intuition

Suppose you hold euros but need dollars for three months, then you want your euros back. You could sell euros for dollars today and buy them back later, but the future exchange rate is unknown. Lock it in now. The rate you lock cannot be arbitrary: if dollars pay more interest than euros, whoever holds dollars over the three months earns more, so the forward must compensate the euro holder by returning slightly more dollars per euro. That compensation is the forward points. It is the interest rate differential expressed in exchange rate terms.

How It Works

Covered interest parity gives the fair forward. For a pair quoted as BASE/QUOTE (units of quote currency per one unit of base):

• Forward = Spot x (1 + i_quote x t) / (1 + i_base x t)

where i_quote and i_base are the two simple interest rates and t is the tenor as a fraction of a year. Forward points are simply Forward minus Spot, converted to pips.

If the quote currency carries the higher rate, the numerator exceeds the denominator, the forward sits above spot, and forward points are positive. The base currency then trades at a forward premium while the higher-rate quote currency trades at a forward discount. On an FX swap the price difference between the near and far legs is exactly these points, which is why traders call them swap points interchangeably.

Worked Example

Take EUR/USD with spot at 1.1000 dollars per euro. The three-month USD rate is 5.00%, the three-month EUR rate is 3.00%, and the tenor is 90/360 = 0.25 years.

• Growth factor, USD (quote): 1 + 0.05 x 0.25 = 1.0125
• Growth factor, EUR (base): 1 + 0.03 x 0.25 = 1.0075
• Forward = 1.1000 x (1.0125 / 1.0075) = 1.1000 x 1.0049628 = 1.10546

Forward points = 1.10546 - 1.10000 = 0.00546, or about +54.6 pips.

In an FX swap you would buy EUR against USD today at 1.1000 and sell EUR back in three months at 1.10546. The euro, the lower-rate currency, trades at a forward premium of roughly 55 points, exactly offsetting the 2% annual rate advantage that dollar holders earn over the quarter. No forecast entered the calculation.

Common Mistakes

1. Reading forward points as a prediction. A large premium does not mean the market expects the currency to rise. It reflects today's rate gap, nothing more.
2. Flipping the parity formula. The higher-rate currency's factor goes where it belongs by quote convention. Swapping numerator and denominator inverts the sign of every point.
3. Ignoring the day-count and tenor. Using 0.5 instead of 0.25, or actual/360 versus actual/365, shifts the points materially. Match the convention of each currency's money market.
4. Assuming parity holds exactly. Since 2008, balance-sheet costs have opened a persistent cross-currency basis, so real forward points can drift from the textbook value.
5. Confusing an FX swap with a currency swap. An FX swap has no interim interest exchanges; a cross-currency swap runs for years and swaps coupon streams along the way.

Frequently Asked Questions

Q: What is the relationship between an fx swap and forward points? The forward points are the price of the far leg relative to the near leg of an FX swap. When a dealer quotes swap points, they are quoting the forward points that separate the two legs, so the two terms describe the same number from different angles.

Q: Why do forward points depend on interest rates rather than currency forecasts? Covered interest parity forces it. If the forward did not offset the rate differential, a trader could borrow the low-rate currency, lend the high-rate currency, and lock the exchange back risk-free for a certain profit. Arbitrage closes that gap, leaving points that reflect only the rate difference.

Q: How do I calculate fx swap and forward points from scratch? Compute the forward with Forward = Spot x (1 + i_quote x t) / (1 + i_base x t), then subtract spot and express the difference in pips. That pip figure is the forward points, and it is the swap points you would pay or receive on the FX swap.

Q: Does a forward premium mean a currency is expected to strengthen? No. A forward premium simply means that currency has the lower interest rate, so it must return more units forward to keep parity. Expected direction is a separate question addressed by uncovered interest parity, which does not reliably hold.

Q: Who actually uses FX swaps? Banks, corporates, and asset managers use them to fund one currency with another, to roll hedges forward, and to manage short-term liquidity. They are among the largest instruments in the FX market by turnover precisely because they carry no net currency risk.

Sources

1. Investopedia. "Forward Points." https://www.investopedia.com/terms/f/forwardpoints.asp
2. Investopedia. "Interest Rate Parity." https://www.investopedia.com/terms/i/interestrateparity.asp
3. Investopedia. "Covered Interest Rate Parity." https://www.investopedia.com/terms/c/covered-interest-rate-parity.asp
4. Bank for International Settlements. "FX swaps and forwards." BIS Quarterly Review. https://www.bis.org/publ/qtrpdf/r_qt1709e.htm

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.