Why does spot settle two days later?

"Spot" sounds instantaneous. It isn't. In FX, spot means the standard value date, which for almost every pair is two business days after the trade date — T+2. The trade is agreed now; the money moves the day after tomorrow.

This is not a technicality. The T+2 convention is the reason the FX swap market exists, the reason your retail position gets "rolled" every evening, and the reason the overnight charge on a leveraged position is the number it is.

The value date, and the business-day rule

The value date is the day the two payments settle. Counting to it has one rule that surprises people: the day must be a business day in both currencies' settlement centres — and, for a pair with a dollar leg, in New York as well.

Worked value-date arithmetic, assuming no holidays:

Add a holiday and the date rolls further. A US holiday on Monday pushes a Thursday trade's value date to Tuesday. A Japanese holiday does the same to a USD/JPY trade even though US markets are open. This is why treasury desks keep a holiday calendar for every currency they touch.

The exceptions worth knowing

• USD/CAD settles T+1. New York and Toronto are in the same time zone with the same payment day, so a second day is unnecessary.
• Several other pairs — including USD/TRY and a handful of emerging-market pairs — also settle T+1.
• Today (T+0) and tomorrow (T+1) value dates can be traded explicitly; they are simply different dates with different prices.

The 5 p.m. New York roll

The FX day ends at 17:00 New York time. At that moment the market's spot value date steps forward by one business day. Trade EUR/USD at 16:55 on Wednesday and the value date is Friday; trade it at 17:05 and the value date is Monday.

That step is the mechanical event behind everything in Unit 3. A retail position is a contract that never reaches its value date — every evening, the broker pushes the date forward, and the price of pushing it is charged or credited to the account.

Why Wednesday costs three days

Look at the table again. On Wednesday, spot value is Friday. On Thursday, spot value is Monday. So the roll that happens on Wednesday evening moves the value date across three calendar days — Friday to Monday. Almost every broker therefore books a triple overnight charge on Wednesday, which is not a fee and not a trick: it is the weekend, paid for on the day the calendar crosses it.

For USD/CAD, which settles T+1, the same logic puts the triple day on Thursday. Holidays shift it again.

Why T+2 exists at all

It is a legacy of paper confirmations, correspondent banking and time zones — two days gave both payment systems a full business day to check and instruct. Equity markets have been shortening (several major markets moved to T+1 in 2024). FX has not, because the FX swap market has made rolling a value date so cheap and so liquid that the convention costs the wholesale market almost nothing to keep.

In the data

A daily price series carries one date per row, and it is the trade date. The last three euro-dollar closes are below: each is stamped with the day the rate was agreed, and nothing marks the value date or the settlement date on which the cash actually changed hands.

Anyone reconciling a price series against a cash ledger is comparing two calendars and will find a systematic offset that is not an error.

Try it now

1. Take today's date and compute the spot value date for EUR/USD, for USD/CAD, and for USD/JPY. Write down which national calendars each one depends on.
2. Read how the data describes the FX market as a venue, below: open from midnight to 23:59 UTC, seven days a week, no holidays. It cannot tell you where 17:00 New York falls. Work that out from your own time zone, and note that the settlement calendar you actually need is not in this record.

3. Find the next Wednesday on which you would be holding a position, and note that the overnight charge that evening will be roughly three times a normal night. You will compute exactly how much in Unit 3.