The S&P 500 is the world’s most renowned stock index. In this article, we will discuss its characteristics, composition, components, geographical distribution of its sales, distribution of its returns, and, most importantly, how to invest in it

S&P 500 UK: Characteristics, Components, and Geographical Distribution
Characteristics of the S&P 500
The S&P 500 is a stock index that tracks the 500 largest companies in the United States. However, not all large-cap companies are included. To be part of the index, a company must meet several criteria:
- Have a market capitalization exceeding $13 billion.
- Be listed on a U.S. stock exchange and not on OTC markets.
- Ensure that the majority of outstanding shares are held by public investors rather than insiders.
- Be publicly traded for at least one year.
- Report positive earnings for four consecutive quarters.
- Have at least 50% of its fixed assets and sales within the United States.
- Have a share price greater than $1.
Market capitalization is calculated by multiplying the share price by the number of outstanding shares. As of February 28, 2023, the S&P 500 had an average market capitalization of over $69 trillion USD
The index is rebalanced quarterly and is managed by S&P Global Inc.
The weight of each company in the index depends on its market capitalization. For instance, a company with a capitalization of $500 billion will have a weight 50 times greater than one with a capitalization of $50 billion. However, it is important to note that this weight calculation only considers the floating shares, excluding those held by insiders.
Components of the Index
Although it was created in 1957, post hoc reconstructions have been made to determine its performance over a broader historical range.
The S&P 500 evolves alongside the American economy, reflecting the changing importance of various sectors. For many years, until the 1990s, the industrial sector had the highest weight, followed by discretionary consumption and financials. However, since then, the industrial sector has fallen to fourth place, with the financial sector rising to first place, followed by discretionary consumption and technology.
This configuration persisted until the 2008 Global Financial Crisis, after which the technology sector gradually ascended to the leading position it holds today. Remarkably, technology climbed from near the bottom, where it was at the end of the 1960s, to the top.
Today, the top 50 positions in the index include the following top 10:
Company | Sector | |
1 | Apple | Information Technology |
2 | Microsoft Corporation | Information Technology |
3 | Amazon.com | Discretionary Consumption |
4 | Nvidia | Information Technology |
5 | Tesla Inc | Discretionary Consumption |
6 | Berkshire Hathaway Inc. Class B | Financial Services |
7 | Alphabet Inc. Class A | Communication Services |
8 | Alphabet Inc. Class C | Communication Services |
9 | Exxon Mobil Corporation | Energy |
10 | UnitedHealth Group Incorporated | Health |
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The technology sector represents just over 27% of the index. These are the weights of each sector:

Geographical Distribution of the S&P 500
As John Bogle said, if you invest in the S&P 500, you are also investing outside the United States. He mentioned this because most of the companies in the index have significant sales outside their home country.
While this is true and there is diversification by sales, there is still limited diversification by regions or sectors. This is because these international sales are concentrated in a few large American companies. For example, Exxon, Apple, Intel, and Amazon occupy the top positions, leading to a concentration of exposure in these companies.

The volatility of the SP500
The volatility of the S&P 500 index is measured using various indicators based on historical price data. The three main indicators for measuring its volatility are the Volatility Index (VIX), the Cross Correlation Coefficient (CC), and the Computed Price Movement Index (CPI).
One of the most important of these is the VIX, also known as the CBOE Volatility Index (Chicago Board Options Exchange). The VIX measures market expectations of volatility over the next 30 days. It is a crucial tool for investors, as it provides insights into anticipated market movements.
The VIX is calculated using a weighted average of the prices of put and call options, resulting in a numerical value that reflects the current state of the financial market. This value helps investors gauge market sentiment and potential future volatility
Distribution of S&P 500 Returns
The following graph shows the distribution of S&P 500 returns for annual ranges. This is useful for three main reasons:
- It helps us understand which returns are most likely.
- It highlights extreme positive and negative returns, indicating that these are uncommon and likely to revert to the mean over time.
- It shows that negative returns are fairly common, reminding us not to be alarmed when we encounter them.

How to Invest in the S&P 500 in UK?
To invest in the S&P 500, we can use Indexed Investment Funds and Indexed ETFs. For those interested in speculating or employing trading or hedging strategies, futures contracts such as the E-mini and Micro E-mini, quoted on the CME, are also options. However, in this post, we will focus on the alternatives available with Funds and ETFs.
Here are the different options available:
Indexed Funds:
- In Dollars
- In Euros
- In Euros with Currency Hedging
Indexed ETFs:
- In Dollars
- In Euros
- In Euros with Currency Hedging
- Physical Replication
- Synthetic Replication
- Accumulation
- Distribution
Best indexed funds investing in S&P500
Fund | ISIN | TER | Index |
Amundi Index S&P 500 – AE (C) | LU0996179007 | 0,30% | S&P 500 |
Pictet-USA Index-R EUR | LU047496624 | 0,75% | S&P 500 |
Amundi Index MSCI North America – AE (C) | LU0389812347 | 0,30% | MSCI North America |
Vanguard U.S. 500 Stock Index Fund EUR Acc | IE0032126645 | 0,10% | S&P 500 |
Fidelity S&P 500 Index Fund P-ACC-EUR | IE00BYX5MX67 | 0,06% | S&P 500 |
S&P500 Equiponderado Equal Weight Index | ES0165242001 | 0,30% | S&P500 Equal Weight Index |
Best ETFs Investing in S&P500
Fund | ISIN | TER | Dividend | Currency |
Lyxor Core Morningstar US (DR) UCITS | LU1781540957 | 0,04% | Dist | Eur |
JPMorgan BetaBuilders US Equity UCITS ETF | IE00BJK9H753 | 0,04% | Acc | Eur |
Amundi Prime USA UCITS ETF DR | LU2089238468 | 0,05% | Acc | Eur |
iShares Core S&P 500 UCITS ETF | IE00B5BMR087 | 0,07% | Acc | Eur |
Xtrackers MSCI USA Index UCITS ETF | IE00BJ0KDR00 | 0,07% | Acc | Eur |
Vanguard S&P 500 UCITS ETF | IE00BFMXXD54 | 0,07% | Acc | Eur |
Vanguard FTSE North America UCITS ETF | IE00BK5BQW10 | 0,10% | Acc | Eur |
SPDR Russell 2000 US Small Cap UCITS ETF | IE00BJ38QD84 | 0,30% | Acc | Eur |
Xtrackers Russell 2000 UCITS ETF | IE00BJZ2DD79 | 0,30% | Acc | Eur |
iShares MSCI USA Small Cap UCITS ETF | IE00B3VWM098 | 0,43% | Acc | Eur |
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Interactive Brokers
If you want to invest in the S&P 500, the first step is choosing the right broker. Interactive Brokers is one of the most popular options available. Notably, this broker offers a zero-commission ETF program, allowing you to invest in over 150 ETFs without any commission fees.
In addition to its zero-commission ETF program, Interactive Brokers is a regulated and trustworthy broker. It also provides opportunities to diversify your portfolio with a wide range of assets, including stocks, forex, mutual funds, bonds, options, and more
Investing in the S&P 500 in UK: Conclusion
It is always important to consider having exposure to this index since the American economy is not only the largest, but the market capitalization of its stock market and the global reach of its companies have no parallel at the moment. However, it cannot be our only exposure.
Indexed investment at your reach:
- FTSE 100: Discover How to Invest in the Biggest UK Stocks
- How to Invest in Nasdaq from the UK: stocks, ETFs and more
- MSCI Indices: What are MSCI indices and how to invest in them?
FAQs about investing in the S&P 500
The average annual return of the S&P 500 over the past 100 years is about 10%. However, the returns of the index can vary significantly from year to year.
The top 3 sectors in the S&P 500 are information technology, financials, and consumer discretionary. These sectors account for over 60% of the index’s weight.
There are a few ways to invest in the S&P 500. You can buy shares of an index fund or ETF that tracks the index. You can also buy individual stocks that are included in the index.