Heatmap · Ledger

The whole US market, one screen

Market heatmap

Every US stock with known sector, industry, and market cap data — sized by market cap, grouped by sector then industry, colored by today's price change.

-8%-4%0%+4%+8%

No stocks with both sector/market-cap and price data yet — the background refresh is still working through the ~8,590-symbol universe. Check back in a while.

A snapshot, not a signal.

Box size reflects market capitalization; color reflects today's price change relative to the previous close. This map is built from a continuous background refresh across the whole market, not a single live snapshot — individual stocks can be minutes to hours old depending on where they fall in the refresh cycle (hover any box for its own last-updated time). This is historical/delayed data, not a prediction, and not a buy, hold, or sell recommendation.

Heatmap. Part of Ledger.

Data: Alpha Vantage ↗