The Anatomy of an Index
Did you know that more than $7 trillion in assets are benchmarked to the Standard & Poor’s 500 Composite Index, including $1.9 trillion in index assets?¹
The S&P 500 is ubiquitous—we see it on the TV news, read about it in the newspapers and very likely see some of our own investments’ performance compared against it. For an index that represents approximately 80% of the value of the U.S. equity market, it may be worthwhile to gain a better understanding of how it works.²
Cap & Criteria
The index, as we know it today, was introduced in 1957 and is maintained by Standard & Poor’s Index Committee. Contrary to popular belief, it is not comprised of the 500 largest companies in America, but is a collection of large-cap stocks representing a broad range of market sectors, including, among others, technology, energy, health care and consumer staples.³
There are a number of criteria a company must meet to be considered for inclusion in the index. Some of these criteria include: it must be a U.S. company, have a market capitalization of $4.6 billion or more, be an industry leader that is representative of a particular market sector and be financially viable.
Changes Over Time
Another common misconception is that the index is a static one. In fact, companies will be removed from time to time for reasons that include violating of one or more of the criteria used for adding companies, or because of a merger, acquisition or significant restructuring, including bankruptcy.
The turnover in the index’s constituent companies is usually around an annual rate of 3.5% to 4.5% on a market capitalization weighted basis, though it may be higher—for example, 8.9% in 2000, or lower, 1.45% in 2003.⁴
Add and Subtract
When changes are made to the index, many mutual funds and exchange-traded funds that seek to replicate the index may have to sell stocks that are being removed and buy the stocks that are being added in order to track the index. Keep in mind that amounts in mutual funds and ETFs are subject to fluctuation in value and market risk. Shares, when redeemed, may be worth more or less that their original cost.
Mutual funds and exchange-traded funds are sold only by prospectus. Please consider the charges, risks, expenses and investment objectives carefully before investing. A prospectus containing this and other information about the investment company can be obtained from your financial professional. Read it carefully before you invest or send money.
It should be emphasized that investors cannot invest in an index. Also, index performance is not indicative of the past performance of a particular investment and past performance does not guarantee future results. Investment choices designed to replicate any index may not perfectly track it, and their returns will be reduced by fees and expenses.
- McGraw Hill Financial, January 2015. The S&P 500 Composite index (total return) is an unmanaged index that is generally considered representative of the U.S. stock market. Index performance is not indicative of the past performance of a particular investment. Past performance does not guarantee future results.
- McGraw Hill Financial, May 2015
- Keep in mind that the return and principal value of stock prices will fluctuate as market conditions change. And shares, when sold, may be worth more or less than their original cost.
- McGraw Hill Financial, May 2015
The content is developed from sources believed to be providing accurate information. The information in this material is not intended as tax or legal advice. It may not be used for the purpose of avoiding any federal tax penalties. Please consult legal or tax professionals for specific information regarding your individual situation. Some of this material was developed and produced by FMG, LLC, to provide information on a topic that may be of interest. FMG, LLC, is not affiliated with the named broker-dealer, state- or SEC-registered investment advisory firm. The opinions expressed and material provided are for general information and should not be considered a solicitation for the purchase or sale of any security. Copyright 2015 FMG Suite.