Most traders only start asking what is swap in forex after noticing an unexplained charge appear on a position they held overnight — and by then it’s often already cost them more than they expected across a longer-term trade.
What is swap in forex, in plain terms?
Swap (also called rollover or overnight financing) is the interest charge or credit applied to a forex position held open past a specific daily cutoff time, typically 5pm New York time. Because a forex CFD effectively involves borrowing one currency to buy another, a financing cost (or credit) based on the interest rate differential between the two currencies applies for every night the position stays open.
A simplified representation — actual broker swap rates vary and are usually published directly on the trading platform.
What is swap in forex: why it can be positive or negative
If you’re long the higher-yielding currency in a pair and short the lower-yielding one, you may actually receive a small credit each night — this is the basis of the “carry trade” strategy. Flip the position and the swap charge works against you instead. Which side of the pair you’re on, not just the pair itself, determines whether swap helps or hurts a position.
Related terms worth knowing
Ignoring swap entirely because a single night’s charge looks small. Held over weeks or months, accumulated swap costs can meaningfully erode — or in a carry trade, meaningfully contribute to — overall position returns.
How does the “triple swap day” catch traders off guard?
Because currency spot trades technically settle two business days later, most brokers apply triple the normal swap charge on Wednesdays to account for the weekend, when banks are closed and settlement still needs to occur. A position opened Wednesday and closed Thursday can therefore incur a noticeably larger financing charge than an identical position held on any other single night of the week.
Frequently Asked Questions
What is swap in forex trading, briefly?
An interest charge or credit applied to a forex position held open overnight, based on the interest rate differential between the two currencies in the pair.
Can forex swap ever be a credit instead of a charge?
Yes, if you hold the higher-yielding currency side of a pair, you may receive a small credit each night instead of paying a charge.
What is a triple swap day in forex?
Most brokers charge three times the normal swap rate on a specific day, usually Wednesday, to account for weekend settlement.
What is a swap-free forex account?
An account type that removes overnight swap charges entirely, often for religious compliance reasons, though other fees may apply instead.
Does swap apply to day trades?
No, swap only applies to positions still open past the daily rollover cutoff, so same-day closed trades avoid it entirely.
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