Short answer
The S&P 500 is an index of the 500 biggest US companies. When people say 'the market is up', they usually mean the S&P 500 is up.
Lesson · 2 min read · Norway edition
What is the S&P 500?
Written in plain English for readers in Norway.
Why it matters
It's the most-followed benchmark in the world. Most investors compare their returns to it.
A note for readers in Norway
This lesson explains a global concept — the same idea applies to markets watched from Norway as anywhere else. Local rules, accounts, taxes and product availability vary and change over time, so we deliberately don't cover them here.
Educational content only — not tax, legal or investment advice. Always confirm current rules with a qualified professional in Norway.
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Same lesson, other markets
Educational content — not financial advice.