The 11 Sectors of the S&P 500: What's in Each, Which ETF Tracks It, and What Moves It

Every company in the S&P 500 index is assigned to one of 11 sectors according to the GICS classification: Technology, Communication Services, Consumer Discretionary, Consumer Staples, Financials, Health Care, Industrials, Energy, Materials, Utilities, and Real Estate. Each sector has an ETF that tracks it, and each one has a different "engine": interest rates move banks and real estate, oil prices move energy, and consumer budgets move consumer discretionary.

Why this matters to a trader: veteran studies on stocks show that a large part of an individual stock's movement is explained by the movement of the market and its sector. A good stock in a weak sector fights a headwind; a mediocre stock in a strong sector enjoys a tailwind. So the first check, even before looking at the stock's chart, is which sector it's in and how that sector is doing.

The sectors, the ETFs, and what moves each one

The Select Sector SPDR series ETFs are the common way to measure a sector: each one holds the S&P 500 stocks of its sector, weighted by market cap. The companies in the table are well-known examples, not a complete list, and the GICS classification is updated every few years (in 2018, for example, Google and Meta moved from Technology to Communication Services, and in 2023 Visa and Mastercard moved to Financials).

Cyclical vs. defensive

The sectors broadly split into two families. Cyclicals (Technology, Consumer Discretionary, Financials, Industrials, Materials, Energy) tend to lead when the economy accelerates and get hit harder when it slows, because their earnings depend on spending by businesses and consumers. Defensives (Consumer staples, healthcare, utilities) sell things people buy in any condition, so they usually fall less in declines and rise less in rallies.

When the market is rising but leadership shifts to defensives, it's a sign that investors are hedging even within the rally. When cyclicals lead, risk appetite is high. Neither situation is a forecast on its own, but both tell you what the "big money" is doing right now.

Sector rotation: the idea, and its limit

"Sector Rotation" is the idea that money flows between sectors according to stages of the economic cycle, and therefore it can be "anticipated." The idea itself is correct in the general sense: different sectors lead during different periods. The hard part is timing. The stages of the cycle are only clearly identified in hindsight, and the market prices them in advance.

The practical version for a swing trader is more modest: not to guess the next stage, but to measure who already strong. A sector trading above its moving averages and beating the S&P 500 over the past month and three months is a better environment to look for long setups in than a sector that's in a slump.

How to use this in practice

• Before every entry, check the sector's condition. A stock breaking out while its sector is below the 200 average is a trade against the current. Not forbidden, but it needs a better reason.
• Relative strength: Compare the sector's return to the S&P 500's return over the same period. This gap, not the absolute return, shows where the money is leaning.
• True diversification: Five chip stocks aren't five trades, they're one big trade. Check how much of the portfolio sits in the same sector.
• Sector events: A report from a major company in the sector (for example, Nvidia for chips) moves the whole sector on the day it's published, including stocks that reported nothing at all.