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S&P 500

What is the S&P 500?

The S&P 500 is an index of large companies listed in the United States. For many people, it is a reference point for conversations about long-term investing.

3 min read

An index is not a fund

The S&P 500 is a way of measuring the performance of a defined group of companies. You do not buy it directly in the way you buy a share in one company. Investors commonly use ETFs designed to track the index as closely as possible.

S&P Dow Jones Indices - who maintains the index

The S&P 500 is developed and maintained by S&P Dow Jones Indices (S&P DJI). It publishes the index methodology and sets the rules for eligibility and periodic changes to the index. It does not manage an investor's account or an ETF, however: an ETF is a separate product issued by a specific provider and may seek to track the index under its own rules and costs.

What is inside

The index contains around 500 large businesses across many sectors. Technology, healthcare, finance, industry and consumer companies have different weights. As a result, performance does not depend on one company, although it still remains tied to the health of the US equity market.

Inside the index

Example companies in the S&P 500

These are selected, recognisable companies - not the full index composition and not a recommendation to buy. The index composition and weights can change.

Apple

Microsoft

NVIDIA

Amazon

Alphabet (Google)

Meta

Broadcom

Tesla

JPMorgan Chase

Walmart

AGI PROCESOR updates this list editorially. Before making a decision, check the current index composition and the documents for the specific ETF.

Diversification does not mean no risk

Spreading capital across many companies reduces concentration, but it does not protect against a broad market decline. In uncertain periods, the value of the index can move significantly. That is why time horizon, liquidity and awareness of your own risk tolerance matter.

How to read historical results

The long-term history of the S&P 500 includes periods of growth as well as deep declines. Historical averages do not tell us what will happen next year. They provide context for understanding why time and consistency can matter more than trying to predict the next move.

Key takeaways

  • 01The S&P 500 is an index, not a single investment.
  • 02S&P Dow Jones Indices publishes the methodology and maintains the index rules.
  • 03An ETF can track the index, but it has its own costs and rules.
  • 04A broad index is still exposed to equity-market risk.

Educational material

AGI PROCESOR is not a financial adviser. This content is educational and does not constitute investment advice or a recommendation to buy or sell.