Green Indicator... But Is the Market Really Rising?
One of the most common misconceptions in the stock market is assuming that a rising index indicates a broadly positive market, or that a falling index means all stocks are being sold off.
However, an index does not measure the number of advancing or declining stocks; rather, it tracks the price movements of constituent companies weighted by their significance within the index. Consequently, the index may rise sharply while the majority of stocks remain flat or decline, or it may fall due to a single heavy-weight stock, even if trading volume in that stock is limited.
How can a single stock move the index?
The Kuwait Stock Exchange indices, including the All-Share, Premier, and Main markets, are calculated using Market Capitalization Weighting.
In simplified terms:
Share Price × Total Outstanding Shares = Market Capitalization Impact on the Index.
The larger a company is in terms of market capitalization, the higher its weight, and the greater the impact of its price change on the index, even if the executed trading volume is small.
Crucially, the Kuwait Stock Exchange’s methodology uses the number of outstanding shares, not just the free-float shares available for trading. Furthermore, the official index value at the end of the trading session is based on the official closing price, or the last traded price if no trade occurs during the closing auction.
This is where the problem arises: A company may be large in terms of share count and market capitalization, yet have weak daily liquidity. In such cases, a limited number of trades can alter the price, and this change is then transmitted to the index due to the stock’s heavy weight.
In other words: High market capitalization + Low liquidity = Exaggerated impact on index movement.
Therefore, one must not confuse:
The value of shares traded during the session with the market capitalization used to calculate the company’s weight.
A heavy stock may move with a small trade, whereas an active, highly liquid company may require millions of shares to move by the same percentage.
What do the Kuwait Stock Exchange indices measure?
• The All-Share Index provides an overview of companies listed in both the Premier and Main markets, but it remains more sensitive to companies with large market capitalizations.
• The Premier Market Index reflects the performance of the largest companies with the highest market capitalization and liquidity requirements; consequently, banks and leading companies dominate the majority of its movement.
• The Main Market Index includes the remaining companies listed in the Main Market and may be more prone to sharp movements due to the presence of relatively large companies with varying liquidity levels.
• The Main 50 Index selects fifty companies from the Main Market based on their average daily trading value, but after selection, it calculates the index performance using market capitalization weighting as well.
Therefore, no single index is sufficient to read the market. Traders need to combine: index movement, trading value, market breadth, sector performance, and the movement of heavy-weight stocks.
The Difference Between Stock Market Indices and MSCI and FTSE Indices
Local Kuwait Stock Exchange indices rely on market capitalization based on total outstanding shares, whereas global indices such as MSCI and FTSE Russell focus on Free-Float Adjusted Market Capitalization.
In other words, they do not merely look at the size of the company, but ask: How many shares can an investor actually purchase in the market?
Therefore, they exclude or reduce the impact of government holdings, strategic shareholders, founders’ shares, and closed shares, while also considering foreign ownership limits and the proportion of shares actually available to international investors.
MSCI employs what is known as the Foreign Inclusion Factor (FIF), alongside liquidity and continuous trading tests. Its liquidity indicators include the Annual Traded Value Ratio (ATVR) and the Frequency of Trading (FOT).
FTSE Russell applies a similar methodology; it adjusts company weights according to free float, foreign ownership limits, and the remaining space available for foreign investors, while conducting periodic liquidity tests.
This means that a company’s weight in the local stock market index may differ significantly from its weight in MSCI or FTSE indices.
Why do global index reviews matter?
• Because passive funds and exchange-traded funds (ETFs) do not buy a stock because they believe in its profitability or fair value; they buy it because they are mandated to replicate the index’s weight.
When a stock is added or its weight increased, automated buy orders are generated.
When a stock is removed or its weight reduced, automated sell orders are generated.
Therefore, you may observe substantial foreign buying that does not reflect a new investment view on the company, but merely the mechanical execution of index rebalancing.
FTSE Russell conducts its main regional reviews in March and September, with additional reviews in June and December for certain changes and additions. Kuwait remains classified by FTSE Russell as a Secondary Emerging Market, with its eligible constituents including the First and Main markets of the Kuwait Stock Exchange.
Consequently, the importance of the closing auction increases on days when reviews are implemented, as funds attempt to execute their trades close to the price that will be used for index calculation.
How can traders read the market more accurately?
Do not look at the index’s color alone; instead, ask the following questions:
1. Is the rally broad-based or concentrated?
2. Does liquidity support the move?
3. Who is driving the index?
4. Is the trading activity normal or related to an index review?
5. What happened in the closing auction?
If most of the change occurs in the final minutes of the session, examine the auction trades and their volumes before judging the stock’s direction.
6. Is the price movement proportional to trading volume?
A sharp price increase with low volume may indicate weak supply, but it could also mean that the price does not reflect broad, sustainable demand.
7. Risks to be aware of
Concentrating weight in a limited number of companies makes the index less representative of the experience of traders holding mid-cap and small-cap stocks.
Conversely, increasing a company’s weight in a global index may attract significant liquidity, but this liquidity may reverse direction when the weight is reduced or when funds tracking emerging markets withdraw capital.
Therefore, foreign flows are important, but they are not always an independent indicator of a company’s quality or the attractiveness of its price.
It is better to develop a set of parallel indices, including:
A free-float-adjusted index, an index with a higher cap on individual company weight, and an index that links weight to both market capitalization and liquidity.
In this way, the general index remains representative of company size, while traders and portfolio managers gain additional indices that reveal market breadth and reduce the impact of illiquid, heavily weighted stocks.
The index tells you where the largest companies have moved, but it does not tell you, on its own, what happened to the rest of the market.
Therefore, do not trade based on screen colors alone… trade liquidity, market breadth, weight, and the actual behavior of the stock.
This is not a call to buy or sell, nor an investment recommendation. This is personal analysis and opinion, and I am not licensed by the Capital Markets Authority.
