Is this stock market heat map live?

Yes. Prices refresh every 10 seconds while the market trades and every five minutes when it is closed, as long as the page is open. The time beside the refresh button shows when they were fetched, to the second. Before the open and after the close, the Pre-market and After-hours buttons color the map by extended-hours moves. When the market is closed, the map shows the last completed session.

Which companies are on this heatmap?

The 500 largest US companies by market value, picked by our own rule. To qualify, a company has to be listed on the NYSE or Nasdaq, file a US annual report (a 10-K), have its head office outside Canada and trade at least $50 million of stock a day on average. Funds, shell companies and limited partnerships are left out. Shopify is the one exception: its head office is in Canada, but it trades mainly on Nasdaq. We rebuild the list every Saturday from SEC filings and market prices. Membership and market caps were last refreshed on 2026-10-31.

No. It is our own list of the 500 largest US companies, and it does not use S&P Dow Jones Indices’ membership or sector data. The biggest companies are on both lists, so the two usually move within about a tenth of a percentage point of each other in a day. The market move quoted under the map is the change in the SPY ETF’s price.

Is there a stock market heat map for tomorrow?

No. A heat map shows moves that have already happened. The closest thing is the pre-market map: from 4:00am ET, the Pre-market button colors each stock by its move since the previous close. Pre-market prices are thin and often reverse at the 9:30am open, so treat that map as a watchlist rather than a forecast.

Tools · Live Market Map

Stock Market Heat Map Today

Pre-market change vs yesterday's close · As of 5:48:31am ET, Tue, Nov 3

Is the Stock Market Up or Down Today?

The SPY ETF is little changed in pre-market trading as of 5:48am ET, -0.07%. It closed down 0.48% yesterday. Under the surface, the Mag 7 is down 0.47% (0.18 points off the market) while chips and memory is up 2.29% (0.22 points on). Of the 284 stocks with a pre-market print, 139 are down and 139 are up.

Drags, by group: Mag 7 -0.47% (-0.18pt), Financials -0.45% (-0.05pt), Health Care -0.42% (-0.04pt)
Lifts, by group: Chips & Memory +2.29% (+0.22pt), Industrials +0.59% (+0.05pt), Energy +0.81% (+0.03pt)

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 map's move in percentage points, weighted by our latest market-cap snapshot, so the total lands near the headline figure without matching it to the hundredth.

What Is Driving the US Stock Market Today?

Across the 284 stocks with data (pre-market change vs yesterday's close, as of 5:48:31am ET), the cap-weighted average move is -0.03% and the equal-weight average is +0.20%, with 139 up and 139 down. A cap-weighted number well below the equal-weight one means a few giants are dragging the headline figure; the reverse means the average stock is weaker than the headline.

Largest drags on the map: AAPL -0.30pt, PLTR -0.06pt
Largest lifts on the map: NVDA +0.12pt, MU +0.04pt, AVGO +0.04pt
Magnificent 7 contribution: -0.18pt
Biggest movers: BE +4.78%MPWR +3.70%KLAC +3.49%PLTR -8.11%AAPL -3.72%PGR -3.54%

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 weekly market-cap snapshot, so the contributions add up to close to the market move quoted with the map, not exactly to it. On the main map that move is SPY's; on the Nasdaq 100 map it is the index's.

Why is the stock market up today? The move by sector and stock, with what was on the calendar.

US Stock Market Heatmap FAQ

Is this stock market heat map live?: Yes. Prices refresh every 10 seconds while the market trades and every five minutes when it is closed, as long as the page is open. The time beside the refresh button shows when they were fetched, to the second. Before the open and after the close, the Pre-market and After-hours buttons color the map by extended-hours moves. When the market is closed, the map shows the last completed session.
Which companies are on this heatmap?: The 500 largest US companies by market value, picked by our own rule. To qualify, a company has to be listed on the NYSE or Nasdaq, file a US annual report (a 10-K), have its head office outside Canada and trade at least $50 million of stock a day on average. Funds, shell companies and limited partnerships are left out. Shopify is the one exception: its head office is in Canada, but it trades mainly on Nasdaq. We rebuild the list every Saturday from SEC filings and market prices. Membership and market caps were last refreshed on 2026-10-31.
Is this the S&P 500?: No. It is our own list of the 500 largest US companies, and it does not use S&P Dow Jones Indices’ membership or sector data. The biggest companies are on both lists, so the two usually move within about a tenth of a percentage point of each other in a day. The market move quoted under the map is the change in the SPY ETF’s price.
Is there a stock market heat map for tomorrow?: No. A heat map shows moves that have already happened. The closest thing is the pre-market map: from 4:00am ET, the Pre-market button colors each stock by its move since the previous close. Pre-market prices are thin and often reverse at the 9:30am open, so treat that map as a watchlist rather than a forecast.