About the U.S. Stock Market Heat Map
This heat map shows how the 500 largest U.S.-listed companies are performing right now, organized the way investors actually think about the market: by sector and industry. Instead of scrolling through hundreds of individual tickers, you can see at a glance which corners of the market are moving — and how much of the overall market is moving with them.
How to Read the Heat Map
Two things on each tile carry information:
- Color shows the direction and magnitude of the price change. Green tiles are up, red tiles are down, and darker shades mean bigger moves. The legend on the right side of the chart maps shades to percentage ranges from -3% or worse up through +3% or better.
- Size shows market capitalization. A trillion-dollar company occupies far more visual real estate than a $50 billion one. This is why the map's overall color is dominated by mega-cap stocks — they're not just bigger numbers in a list, they're a larger share of the actual market.
Hover over any tile to see the company name, ticker symbol, current price, market cap, and percentage change in the tooltip below the chart. Click the ticker to open that company's full quote page.
Sectors and Industries
Companies are grouped first by sector (the broad category — Technology, Financials, Health Care, Energy, Consumer Discretionary, Industrials, Communication Services, Consumer Staples, Utilities, Real Estate, and Materials) and then by industry (the narrower group within each sector — for example, Semiconductors and Software both sit inside Technology). This two-level grouping makes it easy to tell whether a move is broad ("Technology is up across the board") or concentrated ("just the Semiconductors industry is moving").
Time Periods
Use the buttons above the chart to switch the time frame:
- Since Close (Extended Trading) — only appears outside regular U.S. market hours. Shows price change from yesterday's 4:00 PM ET close through the current pre-market or after-hours session.
- 1-Day — today's session, refreshed throughout the trading day.
- 7-Day, 30-Day, 180-Day, 1-Year — rolling windows for spotting longer trends and sector rotation.
Why a Sector View Matters
Looking at the market sector-by-sector tells you something a top-movers list can't: where capital is actually flowing. A day where Technology is deep red but Utilities and Consumer Staples are green often signals a defensive rotation. A day where Energy is the only green sector usually means a commodity-driven move rather than a broad rally. Sector leadership shifts are one of the cleanest signals of changing market conditions.
If you'd rather see the underlying numbers, click View chart data as table below the heat map for a sortable, sector-grouped list of every company shown.
