Forex Spot, Forward, Futures and Swap Markets Explained
Forex spot, forward, futures and swap contracts serve different economic purposes. A spot transaction arranges a near-term currency exchange; a forward locks an exchange rate for a future exchange; a currency future is a standardised exchange-traded derivative; and an FX swap combines two linked exchanges on different value dates. Cross-currency swaps generally exchange cash flows over longer periods and should not be confused with simple FX swaps or retail rollover charges.
This guide compares contract terms, uses, pricing and risks, and includes worked examples of corporate currency hedging. It is particularly important to identify which instrument is actually being offered, because the underlying exposure, settlement terms, collateral and legal protections may differ considerably.
Spot foreign exchange: currency exchange and settlement
For the broader distinction between wholesale and retail foreign exchange markets, see How the Global Forex Market Works.
A spot FX transaction is an agreement to exchange specified amounts of two currencies at an agreed rate for the spot value date. For many major currency pairs, the conventional date is two good business days after trade (T+2), subject to holidays and instrument rules; certain pairs have different conventions. A spot transaction is not always equivalent to instant final delivery.
If a UK company buys $100,000 at a hypothetical GBP/USD quote of 1.2500, the indicative sterling amount is $100,000 ÷ 1.2500 = £80,000, before spread and fees. Payment and receipt usually require instructions, confirmation, funding and settlement arrangements. A customer’s bank or broker may incorporate its charge into the exchange rate.
Institutional OTC spot currency trading is not identical to a retail ‘spot Forex’ margin account. Many retail products reference a spot price but are contractual CFDs or rolling positions in which actual currency delivery is not the central purpose.
Outright FX forwards: exchanging currencies later
An outright forward is a contract agreeing today on the exchange of specified currency amounts on a defined future value date. Forwards are frequently used by businesses and investors to manage future currency-denominated cash flows. They can create budget certainty, but they also establish binding contractual commitments and counterparty exposures.
Forward rates are linked to spot rates and the relative funding conditions of the two currencies, subject to pricing spreads and the cross-currency basis. A forward rate is not merely a provider’s forecast of where the spot rate will trade in three months.
Worked example: a UK importer hedging a dollar invoice
Suppose a UK business must pay a US supplier $500,000 in three months. The current illustrative GBP/USD spot rate is 1.2500, but the available illustrative three-month forward is 1.2400 USD per GBP. By arranging to buy $500,000 at that forward rate, the company fixes the future sterling outlay at approximately £403,225.81, excluding fees and credit charges.
If, at maturity, GBP/USD is 1.1500, buying the dollars at spot would cost $500,000 ÷ 1.1500 = approximately £434,782.61. The forward therefore protected the budget against that adverse move. If GBP/USD instead reaches 1.3500, the spot cost would be £370,370.37; the forward forgoes this favourable outcome. A hedge reduces uncertainty; it does not necessarily minimise cost with hindsight.
| Hypothetical GBP/USD at payment date | Unhedged spot cost of $500,000 | Fixed forward sterling outlay |
|---|---|---|
| 1.1500 | £434,782.61 | £403,225.81 |
| 1.2400 | £403,225.81 | £403,225.81 |
| 1.3500 | £370,370.37 | £403,225.81 |
In a real treasury policy, a business might hedge only a proportion of its expected invoices, use layered maturities or combine forwards and options. The decision depends on cash-flow certainty, financial covenants, counterparty terms and accounting treatment.
FX swaps: exchanging currencies now and reversing later
An FX swap normally combines one exchange of currencies on an initial date with a second, opposite-direction exchange on a later date, with both rates agreed at inception. The near leg might occur spot and the far leg forward, though other combinations exist. These structures are widely used to manage short-term liquidity and foreign-currency funding.
Suppose a bank needs dollars for one month but has euros available. It may exchange euros for dollars on the near leg while agreeing to reverse the exchange in one month. Economically, this can resemble borrowing one currency against lending another, with the forward points embodying the relative funding economics and other pricing components.
FX swaps differ from a standalone forward because two exchange dates are contractually linked. They also differ from many retail platforms’ daily ‘swap’ or rollover charges, which are financing adjustments for keeping a leveraged position open, not necessarily a deliverable two-leg FX swap between institutions.
Cross-currency swaps: longer-term currency funding
A cross-currency swap can exchange principal and interest cash flows in two currencies over a contract term. A conventional structure exchanges principal at inception and reverses it at maturity, with periodic interest payments in each currency; variations exist, including mark-to-market structures. Cross-currency basis swaps can include spreads added to one leg of the reference-rate payments.
A multinational issuer may borrow in the bond market where it has favourable investor demand, then use a cross-currency swap to transform the funding into the currency needed for its operations. This can reduce currency mismatch while introducing derivative counterparty, collateral and basis risks.
Currency futures: exchange-traded and standardised
A currency future is a standardised derivative listed on an exchange, with specified contract size, tick size, expiry, delivery or cash settlement method and margin arrangements. A clearing house becomes central to counterparty-risk management under applicable rules, though margin and liquidity risks remain.
For example, CME’s standard EUR/USD futures contract represents €125,000 and is quoted in US dollars per euro; its minimum outright price increment is specified in the CME FX Product Guide. The precise tick value and specifications depend on the contract. Futures are not merely identical to spot positions with an expiry date added: daily mark-to-market, basis, collateral and contract calendars matter.
Illustrative futures tick calculation
For a €125,000 EUR/USD futures contract with a hypothetical tick increment of 0.00005 USD/EUR consistent with the cited specification, one tick is worth €125,000 × $0.00005/€ = $6.25. A 20-tick change represents a $125 change in contract value before fees; actual margin and total exposure depend on exchange and clearing rules.
Comparing the main FX instruments
| Instrument | Trading structure | Typical purpose | Key exposure |
|---|---|---|---|
| Spot | Generally OTC agreed exchange | Payment and currency conversion | FX movement until settlement, payment risk |
| Outright forward | OTC tailored future exchange | Future cash-flow hedging | Counterparty, liquidity and opportunity cost |
| FX swap | OTC linked near and far exchanges | Short-term currency funding | Funding rollover, settlement and basis |
| Cross-currency swap | Longer-term OTC cash-flow exchange | Funding transformation | Counterparty, rates, collateral and basis |
| Currency future | Exchange-traded standardised contract | Hedging or exposure | Variation margin, basis and liquidity |
| Retail CFD | Provider-specific leveraged derivative | Price exposure | Leverage, financing and provider risk |
What are forward points?
Forward points are linked to relative funding costs, not a guaranteed spot forecast. See Interest-Rate Differentials and Carry Trades.
Forward points represent the difference between the forward and spot exchange-rate quote for the same currency pair and contractual convention: points = F − S. They are commonly quoted in scaled units and do not themselves state whether a currency will appreciate in the spot market.
Using USD per EUR, a simple frictionless one-period covered interest parity expression is:
F = S × (1 + rUSD) / (1 + rEUR).
If S = 1.1000, rUSD = 5% and rEUR = 3% for the matching period, the illustrative forward is about 1.12136 USD/EUR. The positive forward points reflect rate differences in this model. In reality, basis, credit, liquidity and transaction terms can modify the result.
Covered interest parity and the cross-currency basis
Covered interest parity links equivalent investments whose currency exposure is hedged through forwards or FX swaps. In theory, if equivalent funding and counterparty conditions could be accessed costlessly, arbitrage would tend to prevent large deviations. In practice, balance-sheet limits, collateral requirements, regulatory costs and funding premia create cross-currency basis deviations.
The BIS explanation of covered interest parity and the cross-currency basis provides the theoretical and practical framework. A pricing gap does not automatically imply a safe or accessible arbitrage for an individual institution.
Settlement, payment-versus-payment and Herstatt risk
Foreign exchange involves two currencies that may settle through different payment systems and timezones. Settlement risk arises if one party pays the currency sold but does not receive the currency bought. Payment-versus-payment (PvP) arrangements are designed to make the final transfer of one currency conditional on the other, mitigating principal risk where available.
BIS analysis of the 2025 FX settlement survey published in June 2026 shows that the use of PvP and other controls varies significantly across counterparties and currencies. The existence of a spot or forward trade does not establish that it settles through a PvP arrangement.
Hedge effectiveness and basis risk
A hedge can remain imperfect when related prices or exposures change differently. See Currency Correlations.
Different instruments hedge different risks. A fixed forward can match a known payment amount and date, whereas a future with a standardised expiry may leave residual timing or size exposure. An option can preserve upside flexibility at a premium. A cross-currency swap may transform financing but create basis and collateral costs.
Compare not only headline execution costs but also amount, currency pair, tenor, cash-flow dates, acceptable credit terms, accounting requirements and the effect of changing market rates. A hedge that looks effective in a simple end-date comparison can have meaningful interim collateral liquidity needs.
Why OTC and exchange-traded FX markets differ
OTC contracts offer tailoring but depend heavily on counterparties, documentation and bilateral market structure. Exchange-traded futures standardise contracts and route counterparty exposure through clearing arrangements, but may create roll and basis issues when an exposure doesn’t match contract specifications. Neither structure eliminates market risk.
BIS final 2025 survey data report FX swaps as the largest OTC instrument by daily turnover, with spot and forwards also substantial. This reinforces the importance of funding and hedging motives in currency markets. BIS OTC FX turnover commentary.
Common misunderstandings
For definitions of notional value, collateral, settlement and other derivative terms, consult the Derivatives Glossary.
- Spot does not always mean instantaneous settlement.
- A forward rate is not simply a forecast of future spot.
- An FX swap is not the same as a retail overnight rollover fee.
- Cross-currency swaps are generally different from short-tenor FX swaps.
- Futures margin is not the maximum possible loss.
- Clearing reduces some counterparty risks but does not remove market and liquidity risks.
Key takeaways
FX spot, forwards, swaps and futures differ in timing, legal structure, financing, settlement and risk. Choosing an appropriate instrument requires matching the economic exposure rather than selecting the lowest headline price. Derivative pricing is closely tied to interest rates, but market practice introduces basis and counterparty considerations.
Frequently asked questions
What is the difference between a forward and a future?
Forwards are generally tailored OTC agreements; futures are standardised exchange-traded contracts with exchange and clearing rules, including margin and daily settlement mechanisms.
Does an FX forward require an upfront premium?
A conventional forward typically fixes a rate without an option-like upfront premium, but credit support, margin, pricing spreads and other costs may apply.
Why are FX swaps so widely used?
They provide an efficient way to exchange currencies for funding now and reverse the exchange later while managing currency-liquidity needs.
Is a swap rate equal to the interest-rate differential?
Not necessarily: the quotation, tenor, spread, funding rates and cross-currency basis matter.
Does a forward hedge guarantee the cheapest currency conversion?
No. It fixes uncertainty but can forgo a favourable spot move and may involve credit and transaction costs.
Sources and further reading
- BIS, OTC Foreign Exchange Turnover in April 2025.
- BIS, Covered Interest Parity and Cross-Currency Basis.
- CME Group, FX Product Guide 2026.
- BIS, FX Settlement Risk (June 2026).
- FX Global Code.
Important notice: General education, not personalised advice, an offer or a recommendation to trade derivatives. FX contracts can carry leverage, counterparty, financing, settlement and market risks.