Gulf equity markets and index inclusion

The venues 

Six Gulf Cooperation Council states run seven principal equity venues between them. The Saudi Exchange in Riyadh is much the largest by market capitalisation and by turnover. The United Arab Emirates has two onshore venues, the Abu Dhabi Securities Exchange and the Dubai Financial Market, alongside Nasdaq Dubai, which operates from the Dubai International Financial Centre under a separate regulatory regime. Qatar, Kuwait, Bahrain and Oman each run one national exchange.

Two features distinguish the group from the exchanges a reader is more likely to have met. The trading week is not uniform: the Emirati venues moved to a Monday to Friday week, while the others trade Sunday to Thursday, so on any Sunday several Gulf markets are open while the currency, index and commodity markets that would ordinarily frame them are shut. And the listed universe is concentrated by sector. Banks, materials, real estate, telecoms and utilities dominate the weightings, with the largest single listings in the region being partially privatised state enterprises.

That concentration is why regional index weights and regional economic activity are not the same picture. A market whose largest constituents are banks and materials responds to domestic credit conditions and to commodity prices, and it responds to them through company earnings rather than directly.

What a classification actually assesses 

The major index providers each maintain a country classification that sorts markets into developed, emerging and frontier categories, with a watch list for candidates. The categories are not a judgement about an economy. They are a judgement about whether a large international institution can operate in the market at scale without unusual friction, and the criteria fall into three groups.

• Economic development, which is a threshold test applied only to the developed category and is the least interesting of the three for a Gulf reader.
• Size and liquidity, which count how many listings meet minimum thresholds for market capitalisation, free float and traded value. A market can be large and still fail this test if turnover is concentrated in very few names.
• Market accessibility, which is where reclassifications are actually won and lost. It covers openness to foreign ownership, ease of capital inflow and outflow, the efficiency of the operational framework including settlement, custody and account structures, the availability of securities lending and short selling, and the stability of the institutional framework.

Gulf markets have historically been assessed hardest on the third group. Foreign ownership limits, qualified investor registration regimes, delivery versus payment arrangements and the availability of omnibus accounts have all featured in providers' published assessments, and the reforms that preceded the region's reclassifications were largely operational rather than economic. This is the part of the story a headline usually omits: index inclusion follows plumbing.

How a reclassification becomes a flow 

An index is a rule, and a fund that tracks an index has undertaken to follow that rule. When a provider announces that a market will enter an index, it publishes both the effective date and the implementation schedule, often phased across several rebalance dates so that the required trading is spread out. On each effective date, every passively managed fund benchmarked to that index has to hold the new constituents in their index weights, and it has to do so by the close of that date to avoid tracking error.

The buying that results is mechanical. It is not a view about valuation, it is not conditional on the news of the day, and it does not stop if the price rises. That is what makes an inclusion event structurally different from ordinary demand, and it is why turnover on an implementation date can be a large multiple of an ordinary day's while nothing whatever has changed about the companies involved.

Active managers benchmarked to the same index are in a different position. They may hold the new constituents early, late, or not at all, because their obligation is to a performance comparison rather than to a replication rule. Practitioners generally describe the observable pattern as anticipation ahead of the date, a concentrated mechanical print on it, and a partial unwind afterwards, and they disagree about the size of each of the three.

The weight arithmetic 

A constituent's weight is not its market capitalisation. It is its market capitalisation adjusted twice: first for free float, meaning the proportion of shares actually available to be bought rather than held by governments, founders or strategic holders, and then for any limit on foreign ownership, since shares foreign institutions may not legally hold cannot be part of an index those institutions are expected to replicate.

The last row explains why the region's programme of public offerings matters more to index weight than any price move does. Selling a further tranche of a state held company increases the float without changing the company, and weight rises with float. Practitioners often note that a market can gain index weight while its share prices go nowhere at all, and that the reverse is equally possible.

What inclusion does not do 

• It changes no company's earnings, balance sheet or business. The rule that changed is a rule about portfolios.
• The mechanical flow is one off. A fund that has reached its target weight has no further obligation to buy, and the ongoing effect is a higher baseline of index driven ownership rather than continuing demand.
• It cuts both ways. The same rule that obliges buying at an inclusion obliges selling at a downgrade, at a weight reduction, or when a constituent falls out on a scheduled review.
• It ties the market more closely to something external. Once a market is in a widely tracked emerging market index, flows into and out of that whole asset class move it for reasons that have nothing to do with the region.
• It does not remove the accessibility constraints that remain. Ownership limits, registration regimes and settlement conventions continue to apply to anyone dealing in the underlying shares.

Where practitioners disagree 

The first argument is whether the inclusion flow is a durable repricing or a temporary distortion. One tradition holds that a permanent increase in the pool of holders permanently lowers the return investors require, so some of the move should persist. Another holds that the flow is a liquidity event absorbed by dealers who unwind afterwards, and that studies of index events find much of the move reverses. The empirical work is genuinely mixed, partly because every event is announced in advance and so is partly priced before it can be measured.

The second argument is about the classifications themselves. They are defended as the only common language large allocators have for market accessibility, and criticised as a private framework with public consequences, in which a provider's methodology decision moves capital between countries without any accountability to them. Both descriptions are accurate, and the criticism has grown as passive tracking has grown, since the more assets follow a rule the more consequential the rule setter becomes.