By Nummius · October 31, 2026
Sector rotation is the movement of money from one part of the stock market to another as conditions change. A sector rotation strategy tries to stay in the sectors that are gaining strength and out of the ones losing it. There are two main ways to do it: follow a business cycle model (which sectors tend to lead in early, mid and late cycle), or follow relative strength (which sectors are actually leading now). Most active traders use relative strength, with the cycle as background.
The 11 sectors and their ETFs
The S&P 500 is divided into 11 GICS sectors. The Select Sector SPDR ETFs are the most common way to track them:
| Sector | ETF | Character |
|---|---|---|
| Technology | XLK | Growth, cyclical |
| Communication Services | XLC | Growth, mixed |
| Consumer Discretionary | XLY | Cyclical |
| Financials | XLF | Cyclical, rate-sensitive |
| Industrials | XLI | Cyclical |
| Materials | XLB | Cyclical, commodity-linked |
| Energy | XLE | Commodity-linked |
| Health Care | XLV | Defensive |
| Consumer Staples | XLP | Defensive |
| Utilities | XLU | Defensive, rate-sensitive |
| Real Estate | XLRE | Rate-sensitive |
The business cycle model
The classic idea is that different sectors lead in different phases of the economy:
- Early cycle (recovery): consumer discretionary, financials, industrials often lead.
- Mid cycle (expansion): technology and communication services often do well.
- Late cycle (overheating): energy and materials often lead as inflation rises.
- Recession: defensive sectors like staples, utilities and health care hold up better.
The limits: phases are only clear in hindsight, every cycle is different, and markets often move ahead of the economy. Use the model as a map, not a timetable.
The relative strength approach
Instead of guessing the cycle, measure what’s leading. Compare each sector ETF to SPY:
- Ranking returns over several periods (for example 1, 3 and 6 months).
- Relative strength lines for each sector against SPY.
- Relative rotation graphs, which show all 11 at once with direction. See how to read a relative rotation graph.
Macro clues that drive rotation
- Interest rates: rising rates tend to pressure utilities and real estate; financials can benefit from a steeper yield curve.
- Inflation: energy and materials often do better when inflation rises.
- The yield curve: an inverted curve has historically been watched as a recession warning.
- The dollar and oil also shift sector leadership.
A weekly sector rotation routine for swing traders
- Check the backdrop: S&P 500 trend, market breadth, and sentiment such as the put/call ratio.
- Rank the sectors on a weekly RRG or by relative strength.
- Pick one to three sectors that are leading or turning up into leadership.
- Find the strongest stocks inside them.
- Plan entries on the price chart with stops. See the RRG trading strategy.
- Review weekly: if a sector rolls over, tighten stops and shift focus.
Mistakes to avoid
- Chasing last month’s winner after it’s already extended.
- Rotating too often. Weekly is enough for most swing traders.
- Ignoring the market. In a broad sell-off, most sectors fall together.
- Treating defensive leadership as bullish. It often means the market is nervous.
Sector rotation in Nummius
Nummius Markets tracks all 11 sector ETFs against SPY on relative rotation graphs with playback, and puts the drivers next to them: 12 macro series (rates, inflation, the yield curve) pulled automatically from FRED, daily breadth, the put/call ratio with 60 days of history, a screener for the strongest stocks in a leading sector, and alerts when a sector changes quadrant. Core has a 14-day free trial; see pricing.
Frequently asked questions
What is sector rotation in the stock market?
The movement of money between market sectors as economic conditions, rates and sentiment change, so different sectors lead at different times.
Does sector rotation strategy work?
Following relative strength between sectors is a widely used approach, but it isn’t guaranteed. It works best as a filter combined with price-based entries and stops.
How often should I check sector rotation?
Weekly is enough for most swing traders, with a daily look for timing.
This article is for educational purposes only and is not financial advice. Trading involves risk, including the loss of money. Past performance, backtests and practice results do not guarantee future results.