Why does FX trade around the clock but stop for the weekend?
Stock exchanges open and close because they are buildings — or, now, matching engines — with published hours. FX has neither. It is a network of banks, and it is open whenever enough of them are at their desks. That single fact produces the market's famous 24-hour, five-day rhythm.
The relay
The market follows the working day around the planet. Approximate times in UTC, because local clocks shift with daylight saving and the market does not care:
- Sydney and Wellington open the week around 22:00 UTC on Sunday.
- Tokyo runs roughly 00:00 to 09:00 UTC.
- London runs roughly 08:00 to 17:00 UTC.
- New York runs roughly 13:00 to 22:00 UTC, and its Friday close ends the week.
Each centre picks up where the previous one left off. Nothing "opens" globally; a different set of humans and machines simply becomes the marginal price setter.
Geography is uneven. Roughly two-fifths of all global FX turnover is booked in the United Kingdom, and about a fifth in the United States, with Singapore, Hong Kong and Tokyo behind them. London is the centre of this market by a distance — a historical accident of time zone and institutional depth that has proved extremely durable.
The overlap
Between about 13:00 and 17:00 UTC, London and New York are both fully staffed. Three things happen at once:
- The two largest trading centres are quoting simultaneously.
- Most major US and European economic releases land in this window.
- Consequently, spreads are tightest and depth is greatest here.
That is the operational meaning of the overlap. It is not that prices are more likely to go up or down — it is that the market is at its cheapest and deepest to transact in, and that more information arrives per hour. The Tokyo session by contrast is typically quieter, with the yen and the Australasian currencies relatively more active. All of that is an observation about liquidity patterns, not a schedule for when anyone should act.
The 17:00 New York boundary
FX has no closing bell, but it does have a day boundary: 17:00 New York time, which is where the market's value date rolls forward.
Spot FX settles two business days after the trade (T+2), with USD/CAD a notable T+1 exception. A position held past the 17:00 boundary must be rolled to a new value date — mechanically, it is closed and reopened via a one-day swap, and the interest rate differential between the two currencies is credited or debited. This is where "overnight financing" or "swap points" appear on a statement.
The practical artefact: liquidity thins around that moment while books roll, and spreads visibly widen for a few minutes. It is plumbing, not information.
The weekend gap
Banks are shut on Saturday and Sunday, so nothing can settle and the market effectively stops. But the world does not. Elections, policy announcements, geopolitical events and natural disasters happen on weekends, and all of that information hits the first prices quoted when Sydney reopens.
The result is a gap — the Monday opening price can sit some distance from the Friday close with no trading in between. There is no mystery in it: the market simply re-agreed on a price after two days of news it could not react to. Anyone holding a position through the weekend holds it across that discontinuity, which is a mechanical property of the calendar, described here rather than recommended for or against.
In the data
The data describes FX as if it were an exchange, and the description shows how badly the idea fits. Below, the market opens at midnight and closes at 23:59 UTC, every day of the week, and it carries no holidays at all.
For a stock exchange those rows answer "is it open"; here they answer nothing, because the real rhythm is the rolling handover between centres and the weekend close, and neither fits an opening time and a closing time. The seven working days and the missing holidays do not mean FX never pauses. They mean this record has nowhere to say that it does, and the daily chart below, with no Saturdays in it, is the better witness.
Try it now
- A month of daily candles is below. Count the bars in any single week: there are five, never seven. Saturdays and Sundays are absent by construction — worth remembering the next time you count trading days for any calculation.
- Find a Friday and the Monday that follows it. Measure from Friday's close to Monday's open and read the gap in pips. Then ask what happened over that weekend — because whatever it was, it was priced in a single instant rather than over two days of trading.
- Switch the chart to Weekly. Every one of those weekend gaps disappears inside a single bar, and the market looks continuous again. Say in one sentence which of the two views is telling the truth about when this market is open.