A company’s revenues do not change because it enters an index. Neither do its factories, employees, intellectual property or debt. Yet the investment environment surrounding its shares can change considerably.
The same principle can operate at country level, with Greece providing a timely example. In May 2027, the country will move from Emerging Market to Developed Market status in MSCI’s indexes, reversing the downgrade that followed the sovereign debt crisis more than a decade ago. Greek companies will consequently move from one global investment universe into another.
Nothing fundamental happens to those businesses at the moment of reclassification. What can change is the range of investors able, willing or required to own them. That distinction matters because an investment is shaped by the market surrounding it as well as the company underneath it. Index membership can influence ownership, liquidity, trading activity and the institutional capital competing for a security.
A benchmark can change who owns an asset
Institutional investors do not all buy shares for the same reason.
An active manager might acquire a position because of its valuation or expectations for future earnings. An index-tracking portfolio has a different objective: replicating its benchmark. While benchmark-aware active managers face another consideration because the presence or absence of a stock can alter relative positioning and risk.
Index changes can therefore generate significant transactions without anyone changing their view of the underlying business. For widely followed benchmarks, relatively small changes in weight can result in substantial amounts of capital being repositioned.
Not every transaction represents an opinion about value. Some reflect mandates, benchmark construction or portfolio constraints.
That distinction becomes particularly relevant when valuation-sensitive investors meet mandate-driven investors. One participant might need to own a security because it has entered a benchmark, while another decides that the resulting price represents an attractive opportunity to sell. The transaction contributes to price discovery, but the motivations on either side can be very different.
Market value and investable value are not necessarily the same
Consider two businesses with identical £10bn market capitalisations. If the first has most of its shares freely available while a controlling shareholder owns 70% of the second, their practical significance to institutional investors can be very different.
Free float consequently plays an important role in index construction. The proportion of shares available to public investors can affect a company’s investable market capitalisation and its potential benchmark weight (or even inclusion). Foreign ownership restrictions and other accessibility considerations can also further reduce the amount of equity effectively available to international investors.
For institutions deploying significant amounts of capital, these distinctions can be consequential. A company may be large in conventional market-capitalisation terms while remaining relatively small in terms of the capital that can realistically be invested without materially influencing its shares.
Company size, investable size and benchmark importance are closely connected, although they measure different things.
When the investment universe changes
Greece’s forthcoming reclassification illustrates the same principle at country level.
Moving from Emerging to Developed Market status might intuitively sound like an unambiguous increase in the importance of Greek equities. From an institutional perspective, the consequences are more nuanced.
MSCI’s simulations indicate that Greece would account for approximately 0.40% of the MSCI Europe Index, compared with around 0.57% of the MSCI Emerging Markets Index at the time of the analysis. Greek equities would therefore enter a much larger investment universe while potentially occupying a smaller position within the benchmark against which that capital is measured.
There is a useful paradox here: entering a larger investment universe can make an asset less important within that universe.
The transition can also change the natural shareholder base. Emerging-market portfolios may eventually need to reduce or remove Greek holdings, while developed-market and European portfolios become potential owners. Those transactions can take place without either group reaching a new conclusion about the prospects or valuation of the businesses involved.
Can index membership change market characteristics?
Index inclusion can potentially affect more than ownership. Entry into a widely followed benchmark may attract additional institutional attention and trading. Over time, greater participation can influence liquidity, transaction costs and the ease with which larger investors establish or exit positions.
However, these effects should not be assumed to be automatic or permanent. Trading associated with an index change may be concentrated around the rebalance. Longer-term liquidity still depends on factors including free float, the breadth of the shareholder base and underlying investor interest.
There is nevertheless an intriguing feedback mechanism at work. Index providers assess markets and securities partly according to characteristics such as size, liquidity and accessibility. Inclusion in an important benchmark can subsequently influence the investor participation and trading activity surrounding those securities.
A benchmark designed to represent an investable market can therefore become one of the influences shaping that market.
The price can contain more than an opinion about the company
Prices are often discussed as though they represent the collective judgement of investors about future cash flows, risk and valuation. Many of the transactions producing those prices actually come from participants operating under very different constraints:
- Index funds replicate benchmarks
- Active managers manage relative risk
- Pension funds and insurers operate within mandates
Other investors face concentration limits, liquidity requirements or restrictions over the markets and securities they can access.
A buyer can purchase a security without believing it has suddenly become cheaper, just as a seller can dispose of one without concluding that it has become expensive. Index changes make this particularly visible because they can create sizable flows while leaving the fundamental investment case largely untouched.
So, securing a place in an index does not change what a company sells, the assets it owns or the cash it generates. Investments, however, exist within markets as well as businesses. If you change the benchmark, investor universe, ownership structure and liquidity surrounding an asset, then some of the characteristics relevant to investors can change even when the company itself does not.
Understanding the business is therefore only part of understanding the investment. The identity, incentives and constraints of those able, or required, to own it can matter too.