What Is the S&P 500?
The S&P 500 is a list of about 500 of the largest companies listed in the US. People use it as a scoreboard for how the US stock market is doing.
The S&P 500 in simple terms
When the news says "the market rose 1% today", it usually means the S&P 500. It tracks the value of all 500 companies together. Bigger companies count for more, so giants like Apple, Microsoft and Nvidia move it the most.
How companies get in
A committee at S&P Global picks the companies. They must be large, based in the US, traded often, and profitable. Companies that shrink or get bought are swapped out over time.
How to invest in the S&P 500
You cannot buy the index itself. You buy an index fund or ETF that copies it. One purchase gives you a small piece of all 500 companies.
Is the S&P 500 a good investment?
Over long periods it has grown a lot, with yearly returns averaging around 10% before inflation in past decades. But some years it fell hard, like in a bear market. It suits people who can wait many years and not panic in the bad ones.
What if I invest $100 a month?
No one can promise returns. But if it grew 7% a year, $100 a month would become about $17,000 after 10 years, from $12,000 put in. That is compound interest at work, using dollar-cost averaging.
See it in real companies
Open a company to see what it sells and how it makes money.