Definition
The S&P 500 is the most common benchmark for the US stock market. Larger companies carry more weight, so the biggest few have an outsized effect on the index. SPY and VOO are popular funds that track it.
Academy › Glossary › Market Basics
S&P 500
An index of 500 large US companies, weighted by market cap.
Learn it in context with PDB Academy
Guides, short videos and a plain-English glossary in one place, with tools to try each idea on real market data. The basics are free.
Create a free accountOpen PDB Academy