S&P 500 HEAT Map · 30 largest companies · 1-day performance
A live S&P 500 HEAT Map of the 30 largest US companies by market capitalisation. Box size follows market cap and colour follows the one-day price move, so you can read today's market breadth — leaders, laggards and rotation — at a glance.
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HEAT Map FAQ
- What does the S&P 500 HEAT Map show?
- It shows the 30 largest US companies by market capitalisation. Box size follows market cap and colour follows the one-day price change: deep green for the strongest gains, deep red for the sharpest declines.
- How is the box size calculated?
- Each box is weighted by the company's market capitalisation, so mega caps such as Apple, Microsoft and Nvidia occupy the largest areas of the treemap.
- How current is the HEAT Map?
- Prices refresh through the trading day and settle on the official close after the US session ends. Data is delayed and provided for informational use only.