Stock Market Sectors

The U.S. stock market is commonly organized into 11 sectors. We publish those familiar names, but the classification behind them is our data provider's rather than GICS — we correct it where the two genuinely disagree, so mortgage REITs sit with Financials, education with Consumer Discretionary and packaging with Materials. It groups the 21,000+ publicly traded companies we cover by their primary business activity, making it possible to compare performance, identify trends, and build diversified portfolios across the entire market.

Sector analysis is one of the most effective tools available to investors. By tracking how capital flows between sectors, you can identify which areas of the economy are gaining momentum and which are losing favor. Cyclical sectors like Technology and Consumer Discretionary tend to outperform during economic expansions, while defensive sectors like Utilities and Consumer Staples often hold up better during downturns.

Each sector page on Stock Expert AI provides AI-powered MoonshotScore ratings, daily price movements, top gainers and losers, industry breakdowns, and comprehensive stock tables. V2 is the only current model: eligible companies are scored against their sector peers across five pillars — business quality, financial safety, valuation, growth durability, and momentum. MoonshotScore V2 covers eligible common stocks and ADRs on NASDAQ, NYSE and AMEX. OTC listings are outside the scheduled universe; funds, ETFs, warrants, units, SPACs, preferreds, and notes carry no MoonshotScore.

Currently, the largest sector by company count is Financials with 16,797 stocks, while the smallest is Utilities with 565 stocks. Use the sector pages below to drill into each area of the market.

Stock Expert AI rates eligible U.S.-listed companies with the MoonshotScore, a proprietary 0–100 composite rating. V2 is the only current model: eligible companies are scored against their sector peers across five pillars — business quality, financial safety, valuation, growth durability, and momentum. MoonshotScore V2 covers eligible common stocks and ADRs on NASDAQ, NYSE and AMEX. OTC listings are outside the scheduled universe; funds, ETFs, warrants, units, SPACs, preferreds, and notes carry no MoonshotScore.

MoonshotScore V2 rates eligible US-listed companies from 0 to 100 against their sector peers on five pillars: Business Quality (weight 26), Financial Safety (weight 20), Valuation (weight 18), Growth Durability (weight 16) and Momentum (weight 12). It reads no news-sentiment or analyst data, and it is not a probability of future returns.

Figures come from Financial Modeling Prep (FMP). If FMP has no figure for a ticker, a price or fundamental may come from a Yahoo Finance fallback, or a price from an Alpaca fallback. SEC EDGAR is used only for filing links and company identity details (legal name, address), never for figures. Each price is the last quote we recorded, shown with the trading session it belongs to. Pages are served from a cache, so the copy you are reading can lag that quote. Each quote is a provider snapshot, not an exchange feed.

Sector names are the familiar eleven, but the classification itself is our data provider's, not GICS, and departs from it in places — mortgage REITs, education and packaging are filed the way GICS files them; the rest follow the provider. Companies are assigned to one sector and to one of 50+ industries by their primary revenue source.