The concept of 'Inclusion of Shares' involves how shares are counted in regards to market indices and the differences between full-market and free-float methodologies.
In the context of stock markets and indices, “Inclusion of Shares” refers to the methodology used to determine which shares are counted in the calculation of a company’s market capitalization. There are two primary approaches: full-market and free-float.
The full-market methodology includes all of a company’s outstanding shares in the calculation of its market capitalization. This means that every share, regardless of who holds it or any trading restrictions, is counted.
For example, if Company XYZ has 10 million shares outstanding, each priced at $50, its market capitalization under the full-market methodology would be:
In contrast, the free-float methodology only includes shares that are available for public trading. It excludes shares that are restricted, such as those held by company insiders, employees, or any other entity with restricted sale conditions.
For instance, if Company XYZ has 10 million shares outstanding, but only 6 million of those are freely traded on the market, its market capitalization under the free-float methodology would be:
Various stock market indices utilize these methods to calculate their value. Major indices like the S&P 500 and the FTSE 100 use the free-float methodology, providing a market-cap-weighted index that more accurately reflects the investable assets. Conversely, indices that emphasize overall corporate valuation might still use the full-market approach.
Understanding the difference between these methodologies is crucial for investors. A full-market index might overstate the liquidity and operational performance of a company with many non-traded shares, while a free-float index may offer a more realistic overview of stocks from an investor’s perspective.