Tools · Live Market Map
S&P 500 Heat Map Today
Every S&P 500 company as one block on a single heat map: sized by market cap, grouped by GICS sector, colored by its move today, over 5 days, year to date, 1 year or 5 years. Under the tabs, a plain-English read of why the index is up or down today, group by group, that repaints with the map. Hover or tap a block for the numbers; click a sector title to zoom into that sector.
Prices last updated
Why Is the Stock Market Up Today?
The S&P 500 closed up 0.17% at 7,650.50 today. SPY, the S&P 500 ETF, is up 0.15% in after-hours trading as of 7:00pm ET. The Nasdaq Composite closed up 0.39% while the Dow closed down 0.18%. The biggest lift was chips and memory: the group rose 3.45%, which added about 0.34 percentage points to the index. Next came the Mag 7 (+0.15%, 0.05 points) and industrials (+0.46%, 0.04 points). NVDA alone was up 1.34%, about 0.10 points of the index move. The rally was narrow: only 155 of 502 stocks rose, so the gain sat in the largest names. Software and other tech (-1.20%) and communication services (-1.77%) finished lower.
- Drags, by group
- Software & Other Tech -1.20% (-0.09pt), Comm Services -1.77% (-0.04pt), Consumer Disc. -0.78% (-0.03pt)
- Lifts, by group
- Chips & Memory +3.45% (+0.34pt), Mag 7 +0.15% (+0.05pt), Industrials +0.46% (+0.04pt)
No scheduled data release or Fed event is on the calendar today. Today’s full schedule. This block says where the move sits, from the same quotes as the map. The news behind it is a separate question. Points are each group's share of the index move in percentage points, weighted by our latest market-cap snapshot, so the total lands near the official figure without matching it to the hundredth.
After-hours change vs today's 4:00pm ET close · Updated 7:00 PM EDT
What Is Driving the S&P 500 Today?
Across the 502 stocks with data (after-hours change vs today's 4:00pm et close, as of 7:00 PM EDT), the cap-weighted average move is +0.24% and the equal-weight average is +0.39%, with 244 up and 77 down. A cap-weighted number well below the equal-weight one means a few giants are dragging the index; the reverse means the average stock is weaker than the headline.
- Largest drags on the index
- AAPL -0.03pt
- Largest lifts on the index
- V +0.03pt
- Magnificent 7 contribution
- +0.02pt (7% of the move)
- Biggest movers
- COF +8.79%VICI +8.26%ACN +7.84%EBAY -5.53%ALGN -1.63%JCI -1.54%
Drag and lift figures are each stock's contribution to the cap-weighted move, in percentage points; they update with the map. Weights come from our latest market-cap snapshot, so the totals are close to, not exactly, the official index move.
S&P 500 Heat Map by Sector
4 of the 13 sector groups on the map are up in after-hours trading and 9 are down, with chips and memory the strongest at +3.45% and software and other tech the weakest at -1.20%. The Mag 7 and the chip makers are pulled out of technology and communication services so a mega-cap day and a sector day do not read the same.
| Group | Move | Index points | Share of index | Stocks |
|---|---|---|---|---|
| Chips & Memory | +3.45% | +0.34pt | 9.8% | 20 |
| Mag 7 | +0.15% | +0.05pt | 34.0% | 7 |
| Industrials | +0.46% | +0.04pt | 7.9% | 83 |
| Financials | +0.10% | +0.01pt | 12.6% | 76 |
| Energy | -0.20% | -0.01pt | 3.4% | 21 |
| Real Estate | -0.94% | -0.02pt | 1.7% | 30 |
| Health Care | -0.20% | -0.02pt | 8.8% | 59 |
| Materials | -1.08% | -0.02pt | 1.7% | 25 |
| Utilities | -1.42% | -0.03pt | 1.9% | 31 |
| Consumer Staples | -0.56% | -0.03pt | 4.9% | 34 |
| Consumer Disc. | -0.78% | -0.03pt | 3.5% | 45 |
| Comm Services | -1.77% | -0.04pt | 2.4% | 21 |
| Software & Other Tech | -1.20% | -0.09pt | 7.2% | 50 |
Move is the cap-weighted average of the group's stocks. Index points is that move multiplied by the group's share of index weight, which is what it contributes to the index figure, so the column adds up to roughly the whole move. Share of index is the group's weight in our latest market-cap snapshot. Stocks counts the names in the group with a print this session.
How to Read a Market Heatmap
A market heatmap compresses an entire index into one picture. Each rectangle is a company, its area is proportional to market capitalization, and its color is the percentage move over the selected timeframe: green for up, red for down, with intensity capped at a move that is large for that window (3% for a single day). Because the blocks are grouped into sectors, the first glance tells you where the day is happening: a sea of red with one green sector is a rotation, uniform color is a macro day, and a single deep-colored mega-cap block is a stock story big enough to move the whole index.
Size matters more than color. A 1% move in the largest technology block moves the index more than a 10% move in the smallest utility, which is exactly what the areas are telling you. That is also why cap-weighted days can feel wrong: most tiles can be green while the index falls, if the few giant tiles are red.
The session toggle switches the same map between the regular session, pre-market and after-hours. Extended-session prints are thinner and moves there routinely fade or reverse at the open, so treat the pre-market map as a watchlist, not a verdict. For what is scheduled to move these stocks next, our earnings calendar pairs naturally with this page.
S&P 500 Heatmap FAQ
- Is this S&P 500 heat map live?
- Yes. Prices refresh about once a minute while the page is open, and the map re-renders on the server on the same cadence, so a first load already carries the current session. During the regular session the colors are today’s move against yesterday's close; before the open and after the bell the pre-market and after-hours toggles color the same blocks by the extended-session move. The timestamp above the map says which minute the prices came from, and the refresh button next to it fetches them again on demand.
- Which sectors are moving the S&P 500 today?
- The by-sector table under the map ranks all eleven GICS sectors, plus the Mag 7 and the chip makers pulled out separately, by the percentage points each one contributes to the index move. A group’s contribution is its cap-weighted move multiplied by its share of index weight, so a 1% move in technology counts for far more than a 5% move in utilities, and the column adds up to roughly the whole index figure. Clicking a sector title on the map zooms into that sector alone.
- Is there an S&P 500 heat map for tomorrow?
- No: a heat map colors moves that have already happened, so tomorrow’s does not exist until tomorrow trades. The closest thing is the pre-market map, which this page switches to from 4:00am ET using the Pre-market toggle, and which colors each stock by its move against the previous close before the 9:30am open. Extended-session prints are thin and often fade at the open, so the pre-market map is a watchlist rather than a forecast. For what is scheduled to move these stocks next, the earnings calendar and today's timetable are linked below.
- What do the colors on this heatmap mean?
- Each block is colored by that stock’s percentage move for the selected timeframe and session: shades of green for gains, shades of red for losses, gray for unchanged or no data. Color intensity saturates at a move that is large for the timeframe: 3% on the one-day view, 6% over 5 days, 25% year to date, 50% over a year and 150% over five years, with the exact scale shown under the map. Every block also shows the signed percentage when it is large enough, and the popup always carries the exact figure.
- Can this heatmap show 5-day, year-to-date, 1-year and 5-year performance?
- Yes. The 1D / 5D / YTD / 1Y / 5Y toggle above the map recolors every block by its move over that window: 5D against the close five trading sessions back, YTD against the final close of last year, and 1Y and 5Y against the price one and five years ago (a company listed more recently is measured from its first close). Block sizes stay proportional to market cap on every view, and the pre-market and after-hours toggles apply to the 1D view.
- How do I zoom into one sector?
- Click a sector’s title bar. Hovering the title first highlights every block that belongs to the sector; clicking expands that sector to fill the whole map, with each company resized against its sector peers. Click the title again, press Escape or use the all-sectors button to zoom back out.
- What decides the size of each block?
- Block area is proportional to the company’s market capitalization within the S&P 500, so the biggest companies take the most space, and blocks are grouped into GICS sectors sized the same way. Membership and market caps were last refreshed on 2026-09-12.
- How often do the prices update?
- Quotes refresh roughly every minute while you keep the page open during market hours, and the page itself is re-rendered with fresh prices about once a minute, so the colors you land on are already current. The circular-arrow button next to the timestamp fetches the latest prices on demand. When the market is closed the map shows the last completed session.
- Does this heatmap show pre-market and after-hours trading?
- Yes. Use the Regular / Pre-market / After-hours toggle above the map. In pre-market mode colors show each stock’s pre-market change versus yesterday’s close; in after-hours mode they show the move since the 4:00pm ET close. Stocks that have not traded in the extended session show gray.
- Which companies are included in the S&P 500 heatmap?
- All 502 S&P 500 companies in our current snapshot. Where the index holds two share classes of the same company, they share one block rather than appearing twice: Alphabet’s GOOG is folded into GOOGL, and the block is sized by Alphabet’s market capitalization as a whole. Membership is re-verified weekly. The Nasdaq 100 heatmap is one tab over.