What Rollover Means
In forex and CFD trading, rollover refers to extending an open position beyond the trading day's settlement cutoff instead of closing it. Because spot forex trades are technically agreements to exchange currencies within a short settlement window, positions held past the cutoff are "rolled" to the next value date. When this happens, an adjustment is applied to the account, often called the rollover rate, swap, or overnight financing charge.
The size and direction of the adjustment typically reflects the interest rate differential between the two currencies in a pair, plus any financing markup applied by the provider. Depending on which currency you are long or short, the rollover can be a small credit or a small debit. For CFDs on stocks, indices, or commodities, overnight financing usually reflects a benchmark rate plus a markup rather than a currency interest differential.
Why It Matters
Rollover turns time into a cost (or occasionally an income stream) for anyone holding leveraged positions overnight. Day traders who close everything before the cutoff may never pay it, while swing traders and longer-term position holders can see rollover meaningfully affect returns. A trade that looks profitable on price movement alone can be less attractive once weeks of overnight charges are subtracted. Conversely, some traders deliberately hold positions that earn positive rollover, a style often associated with carry strategies.
Rollover interacts closely with the spread and other trading costs, so it belongs in any realistic estimate of total cost of ownership for a position. A tool like a cost of trading calculator can help you frame these costs before committing capital.
A Simple Example
Suppose a trader holds a long position in a currency pair where the base currency has a higher short-term interest rate than the quote currency. Holding that position past the daily cutoff might generate a small nightly credit. If the trader instead held the opposite side, the same interest differential would typically produce a nightly charge. Over one night the amounts are usually tiny relative to the position, but over 30 or 60 nights they compound into a figure that can rival the trade's expected price gain.
Many providers also apply a multiple-day rollover once a week (often called triple swap day) to account for weekend settlement, which can surprise traders who only budget for single nights.
Common Mistakes
- Ignoring rollover when planning multi-day or multi-week trades.
- Assuming rollover is always a charge; it can be a credit, but direction depends on the pair and the side of the trade.
- Forgetting the multi-day rollover applied around weekends.
- Comparing platforms only on spreads while overlooking overnight financing differences.
- Confusing rollover with a margin call or other account events triggered by the same overnight window.
What to Verify Before Acting
Before relying on any rollover figure, check your specific provider's published overnight financing methodology, the exact daily cutoff time in your account's time zone, which day carries the multi-day adjustment, and how credits and debits appear on your statements. Rates change as central bank rates and provider markups change, so re-check them for longer holds.
Limitations note: Rollover applies to leveraged derivative products, which carry a risk of losses exceeding your initial outlay in some structures. This entry is a general educational draft, not personalized advice, and does not describe any specific provider's rates or terms. Verify current financing terms directly with your provider and compare options using resources like broker comparison tools and independent broker reviews before trading.