GICS (Global Industry Classification Standard), developed by MSCI and S&P Dow Jones Indices, sorts every public company into 11 sectors, 24 industry groups and finer sub-levels based on its principal business activity — the single most useful label for understanding a stock.
Sector is the single most useful label for understanding a stock's behaviour. Stocks in the same sector move together because they share customers, input costs, and economic drivers — rising rates hit Real Estate, an oil-price jump lifts Energy, a consumer slowdown pressures Consumer Discretionary. Knowing a stock's sector tells you what to compare it against (a bank only makes sense next to other banks) and is the foundation of diversification: ten stocks in one sector are barely diversified.
The sector heatmap groups the scanned S&P 500 constituents by GICS sector and averages the equal-weighted realised return within each — a breadth view, is the whole sector moving together? Example (illustrative): if Energy's scanned names averaged +2.1% while Utilities averaged −0.4%, the heatmap shades Energy green and Utilities red, showing risk appetite tilting toward cyclicals. Being equal-weighted, a couple of small names moving hard can swing a tile more than the cap-weighted index would.
Eleven: Information Technology, Health Care, Financials, Energy, Consumer Discretionary, Consumer Staples, Industrials, Materials, Utilities, Real Estate, and Communication Services — breaking down further into 24 industry groups and finer sub-levels.
Stocks in the same sector share customers, costs, and drivers, so they move together. Sector tells you what to compare a stock against and is the foundation of diversification.
It averages equal-weighted realised return across each sector's scanned constituents — a breadth view, not the cap-weighted return of the official S&P sector indices.
Browse all S&P 500 tickers to see this metric applied to individual companies.
Educational research only — not investment advice.