What Is Swap or Overnight Financing in Trading?

What is swap in trading? Learn how overnight financing is calculated, why it can be a credit or a debit, what triple-swap day means, and how it changes the economics of holding a position.

In retail FX and CFD trading, swap is the charge or credit applied to a position held open past the daily rollover. It reflects the cost of financing a leveraged position overnight and, on currency pairs, the interest rate difference between the two currencies. (The word has other meanings in finance — interest rate swaps, for example — which are not covered here.)

Key Takeaways

• Swap is applied once a day at rollover to every open position. Close before rollover and it does not apply.
• It can be a debit or a credit, depending on the instrument and whether you are long or short.
• One day each week carries a triple swap to cover the weekend.
• Over days it is noise. Over weeks and months it is a material part of the return.

Why Swap Exists

When you trade with leverage, you control a position far larger than the margin you posted. The difference is financed. Swap is the daily cost of that financing.

On currency pairs there is a second component. Holding EURUSD long means you effectively hold euros and owe dollars overnight. If euro interest rates are lower than dollar rates, you pay the difference; if higher, you receive it. This is why swap on currency pairs can be positive. The mechanism behind it — the tom-next roll — is explained in spot FX vs CFDs.

On CFDs on shares, indices and commodities, swap is closer to a pure financing charge: a benchmark rate plus a broker markup, debited on long positions and, depending on rates, credited or debited on shorts.

How Swap Works

At rollover — a fixed server time each day — the platform applies the swap to every open position. In MetaTrader 5 the rate appears in each instrument's contract specification as Swap Long and Swap Short, expressed in points, as an annual percentage, or in a currency amount depending on the instrument's swap type, and the amount charged appears in the Swap column of the terminal.

Triple-swap day. Currency markets settle two business days after the trade. A position held over Wednesday night settles on Monday, which means it carries three days of financing. To account for this, one weekday carries three times the normal swap. For currency pairs that day is conventionally Wednesday; for other instruments it varies by broker.

Worked Calculation

Suppose the contract specification shows Swap Long on EURUSD as −0.60 points per lot per night, and you hold 1.00 lot long for two full weeks: 10 rollovers, two of which are the triple-swap day, with no holidays.

That is modest. Now hold the same position for six months (roughly 130 rollovers, 26 of them triple):

On a position with $542.50 of margin at 1:200, six months of swap has cost a fifth of the margin, whether or not the price moved.

(Illustrative rates. Actual swap values are in the contract specification and change with interest rates.)

Why It Matters

Swap decides what kind of instrument you are holding. A currency position closed before rollover incurs no swap. The same position held for six months is as much an interest rate position as a currency position.

Three consequences:

• It sets the cost of patience. A trade that needs weeks to work has to overcome accumulated swap as well as the spread.
• It can flip. When a central bank changes rates, the swap on a pair can move from credit to debit without any price change.
• It is invisible in the chart. Nothing on a price chart shows swap. It appears only in the account.

Swap-free accounts. MarketsAll offers a swap-free option on Premium accounts. On a swap-free account no overnight financing is charged and no fee replaces it. The conditions attached to it are set out in the account terms.

Risks Related to Swap

• Underestimating it on long holds. Daily amounts look trivial; accumulated amounts are not.
• Triple-swap surprise. A position opened on Wednesday afternoon and closed Thursday morning pays three days for one night.
• Carry positions reversing. A position held for positive swap can lose more on the price than it earns on the swap.

Is swap charged every day?

Once per rollover, on every position open at that moment. Weekends are covered by the triple-swap day rather than charged separately.

Can swap be positive?

On currency pairs, yes, when the currency you are long pays a higher interest rate than the one you are short. On most CFD positions it is a debit.

What time is swap applied?

At the server's rollover time. MarketsAll's rollover time and the triple-swap day for each instrument are in the contract specification.

How do I avoid paying swap?

Close positions before rollover, or use a swap-free account where available. Closing before rollover removes overnight exposure altogether. On a swap-free account no overnight financing is charged and no fee replaces it; the conditions are in the account documentation.

Does swap apply on a demo account?

Yes, typically. Demo accounts mirror live conditions including swap, which is useful for seeing how it accumulates.

Related Terms

What is CFD trading · Leverage · Spread · Contract specification · Spot FX vs CFDs