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What Is the S&P 500 Index? S & P 500 Index Investors Guide

September 09, 2025

The S&P 500 index (also known as Standard and Poor’s 500) is one of the most important elements in the global financial markets. It covers 500 of the biggest publicly traded companies in the US. This means that it includes world-famous names such as Apple, Amazon, Microsoft, and McDonald's, giving us a fair representation of the overall American economy. 

 

There are various ways to track the S & P 500 index. Apart from simply buying each of the stocks listed, you can also look at index funds, mutual funds, or exchange-traded funds (ETFs) that are based on this index. A contract for difference (CFD) gives you another option, where you don’t own the underlying asset but can still gain from price movements.  

 

We’ll be looking at these different ways to trade the S&P Index, with popular index funds like the Usa500 and ETFs among the main options. By considering how to use performance trends and live data resources, we’ll see how to start index trading in ways that suit you.

 

What Is the S&P 500 Index and Why Does It Matter?

The S and P index is important because it represents 500 of the biggest US companies by market capitalisation. This means that it works well as a benchmark for the overall stock market.

 

It covers 80% of the American stock market in terms of capitalisation, with the most valuable companies given more weight on the index. The S&P Index is updated regularly, using a set of selection criteria to ensure that the biggest companies are always included.    

  

In this way, traders and investors can use the S&P 500 Index to gain exposure to the overall American market and economy. The popularity of this index makes it one of the most widely used and discussed stock market indicators globally.

 

List of S&P 500 Companies – Who Makes Up the Index? 

What companies are in the S&P 500, and how are they chosen? This index includes a broad mixture of stocks from different sectors such as technology, finance, and healthcare. This level of diversity ensures that it’s a solid economic indicator that covers the most important parts of the American economy.  

 

The list of S&P 500 companies isn’t set in stone. This is something that changes over time, as a committee looks at the performance of the companies in the S&P 500 regularly, before deciding whether to make any changes.   

 

The following are the main factors that are taken into account when they update the S&P 500 companies list.    

  • Market capitalisation has to be at least US$22.7 billion.
  • The market liquidity and public float levels.
  • The monthly trading volume has to reach a minimum of 250,000 shares over a period of six months.
  • The company has to be publicly listed on the New York Stock Exchange, Nasdaq, or Cboe.
  • All S and P 500 companies need to have their primary domicile on an exchange in the US.
  • Certain types of securities are excluded from being considered as S&P500 companies, such as limited partnerships, closed-end funds, preferred stock, and investment trusts.

     

How Is the S&P 500 Index Calculated? 

By using the market capitalisation weighting method, the biggest S&P 500 companies carry more weight in the overall index. This means that the S&P 500 index fund calculator takes into account the biggest stocks that make up more than a third of the index’s total market capitalisation. In addition, the top 50 companies are responsible for 60% of the overall index.

 

This means that the S&P 500 index fund performance reflects the wider market while keeping a focus on the biggest companies leading the way.

 

Best S&P 500 Index Fund and ETF Investment Options

S&P 500 index funds and ETFs provide an extremely popular investment method. They allow investors to easily gain broad exposure to the American market through a single product. The impressive returns made by this index in the past have encouraged many people to look into the S & P 500 index fund products provided by the likes of Vanguard, Fidelity, and Schwab.  

 

The different ways of investing each come with unique aspects to be taken into account. 

  • Buying index funds in the S&P 500 could be viewed as a long-term strategy. Many investors choose this as a way of attempting to grow their funds over a period of time, relying on the belief that the top American stocks will keep on climbing in value.
  • The best S and P 500 index funds offer a solid investment strategy. The likes of the Vanguard S&P 500 index fund, the Fidelity S&P 500 index fund, and the Schwab S&P 500 index fund are among the most popular choices.           
  • CFDs are also based on the S&P, but work differently from S and P 500 index funds. With a CFD, you’re speculating on the price rising or falling, using leverage to attempt to gain bigger profits from the market’s movements. 

 

S&P 500 Index Chart and Live Performance Tracking

Charts can be used to effectively track the S&P 500 index fund performance in real time, as well as giving you a way to look at historic performances. This provides valuable insights for active traders and those who hold CFD positions or other types of investments.

 

By tracking the S&P 500 index fund price, traders can see how the market is moving and decide whether they believe that it will rise or fall. The fact that this index is so widely used and tracked means that it’s easy to find the S&P index current price in places such as the graphics on this S&P-based cash index.

 

Looking at the S&P 500 index today doesn’t guarantee that you will be able to accurately calculate the direction of the market in the future. But it can help you to get a feel for the situation and make an informed decision on what you think might come next. 

 

How to Trade the S&P 500 Index with CFDs

The question of how to invest in the S&P 500 index fund can be answered in several ways. CFDs offer one of the ways for traders to gain exposure to this index, through a reliable platform like ActivTrades. This adds the benefit of being able to go long or short, depending on how you think the current S&P 500 index fund price will move.   

 

This also introduces the possibility of using leverage to make trades potentially more profitable. However, it’s important to remember good risk management techniques when calculating whether to make any type of trade using the S&P500 index price. 

 

S&P 500 Index FAQs     

 

Is It Easy to Invest in the S and P 500 Index?

Yes, this can be done in several ways, from straight forward stock purchases for each company to products like index funds, ETFs, and CFDs.

 

What Average Return Does the S&P 500 Companies Index Provide?

Since it began in 1926, the average return of the S and P index has been around 10%. However, the exact figure varies from one year to the next, and your performance will also depend on the exact instrument you choose.

 

 

The information provided does not constitute investment research. The material has not been prepared in accordance with the legal requirements designed to promote the independence of investment research and as such is to be considered to be a marketing communication.

 

All information has been prepared by ActivTrades (“AT”). The information does not contain a record of AT’s prices, or an offer of or solicitation for a transaction in any financial instrument. No representation or warranty is given as to the accuracy or completeness of this information.

 

Any material provided does not have regard to the specific investment objective and financial situation of any person who may receive it. Past performance is not a reliable indicator of future performance. AT provides an execution-only service. Consequently, any person acting on the information provided does so at their own risk. Forecasts are not guarantees. Rates may change. Political risk is unpredictable. Central bank actions may vary. Platforms’ tools do not guarantee success. Trading with leverage involves significant risk. It can magnify both profits and losses.

 

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