Ramadan and Eid market hours

A calendar that moves against the other one 

Ramadan is the ninth month of the Hijri calendar, which is lunar. Twelve lunar months are shorter than a solar year by roughly eleven days, so every event fixed to the Hijri calendar arrives earlier in the Gregorian year than it did the year before, and completes a full circuit of the seasons over about three decades. A Ramadan that fell in high summer will, within a working career, fall in midwinter.

That drift is the first operational fact, and it is the one most often missed by anyone building a calendar from outside the region. A Gulf holiday cannot be entered in a system once and reused. It moves, and it moves by an amount that is itself not perfectly predictable, because the start of a lunar month is confirmed by observation of the new crescent rather than fixed by calculation. Astronomical calculation narrows it to one of two days; the announcement resolves it, and the announcement can come the evening before.

What shortens during Ramadan 

Labour legislation across the Gulf states reduces the working day during Ramadan, conventionally by two hours, and the reduction generally applies to all employees rather than only to those fasting. Public sector hours are set by government circular each year, and private employers apply the statutory minimum reduction within their own arrangements. Bank branch hours and the operating hours of government service counters shorten with them.

Regional exchanges publish their own Ramadan schedules, and they typically shorten the trading session rather than merely shifting it, so the daily window in which a Gulf listed security can be dealt is narrower for the month. The venues announce the schedule ahead of the month and it is not identical across the region, since each exchange sets its own.

The pattern of activity inside the shortened day changes as well, and this is the part no timetable records. Business hours across the region reorganise around the pre dawn meal, the fast and the meal at sunset, so a working day that formally starts at the usual hour is not staffed the way it usually is, and a considerable amount of commercial activity moves into the evening. Turnover on regional venues has historically been lower during the month, which is a description of what has been observed rather than a rule.

What closes at the two Eids 

Two holidays follow the fasting month and the pilgrimage respectively. Eid al Fitr marks the end of Ramadan, and Eid al Adha falls in the twelfth Hijri month. Both are public holidays across the Gulf, both close regional exchanges and banks, and both run for several days, with the exact length set by each government and frequently extended around an adjacent weekend.

Because the start day is confirmed by sighting, the closure is announced at short notice, and its length can change after it has been announced. Neighbouring states can begin the holiday on different days. Anything that depends on a business day therefore has a genuinely uncertain calendar for the affected week: bank transfers, local settlement, document processing and any local counterparty's availability all move with the announcement rather than with a published schedule.

• Regional exchanges close, and an instrument written on a listing at a closed exchange does not quote while the venue is shut, exactly as it would not on any other exchange holiday.
• Local banks close, so domestic transfers do not settle and any process that depends on a local business day is deferred.
• The global currency market is entirely unaffected, and quotes, releases and turnover in London and New York carry on as on any ordinary day.
• Firms set their own coverage over regional holidays, so support and operations hours are a published fact of the firm rather than something implied by the holiday.

The asymmetry that matters 

A holiday in the Gulf and a holiday in a major financial centre are two entirely different events for a global market, and conflating them is the most common error in this area. When a major centre closes, a large share of the world's dealing capacity is absent, quoted spreads widen and the market becomes easier to move. When the Gulf closes, the participants who were absent were never a material share of turnover in the major currency pairs, so the global market does not thin at all.

The asymmetry runs the other way for a Gulf reader. The market that is unaffected by a regional holiday is precisely the market a regional position is exposed to, so a multi day closure is a period during which a position is fully exposed and the local infrastructure around it is not operating. That is a description of a structural condition. It is not a suggestion about what should be done before or during such a period, which is a matter for the holder and for any risk arrangements they already have in place.

What continues to accrue while a regional desk is shut 

A financing adjustment is charged or credited on a position held past a daily cut off, and it is derived from the difference between the two currencies' interest rates. Nothing about a local public holiday suspends it. Where the global market is quoting, the cut off happens and the adjustment applies; where the market is closed, the convention is to charge the closed days on a designated adjacent day so the calendar is accounted for in full.

Where practitioners disagree 

One argument concerns whether a Ramadan effect exists in regional equity markets. A body of work reports lower volatility and lower turnover during the month and offers behavioural explanations for it. Critics point out that the sample is small, that the month drifts across seasons and therefore across every other calendar effect, and that a result which survives in one specification often does not survive in another. The honest position is that reduced turnover during a month of shortened trading hours is close to a definitional consequence, and that anything beyond it is contested.

A second argument concerns the announcement convention itself. One view holds that confirming a lunar month by observation is a settled practice with religious authority behind it, and that the operational inconvenience is a cost of correctness. Another holds that calculation is now precise enough to publish a calendar years ahead, and that several jurisdictions elsewhere already do so for civil purposes. That debate is not a market debate, but the outcome of it is what determines how much notice a Gulf operations desk gets.