Market Heatmap — 500+ Stocks by Sector and Size

Quick Answer

The Market Heatmap is a free map of the S&P 500. Each of the 500+ stocks is a box (a treemap), grouped by sector. The bigger the company, the bigger the box.

Color runs from deep green (strong gains) to deep red (heavy losses), so sector trends, momentum shifts and concentration risk stand out at a glance. Prices come from TradingView and are delayed on its free tier.