# Sector rotation: how it works and what the evidence says

> Sector rotation explained: the 11 GICS sectors and their ETFs, business-cycle vs momentum rotation, and a classic rule with dated backtest figures.

Written by [Tactfolio research team](https://tactfolio.com/about/editorial-policy.md), published 2026-10-16, updated 2026-10-16, data as of 2026-09-25.

Sector rotation is moving money between parts of the stock market, such as technology, energy or utilities. The aim is to hold the ones you expect to do better. Business-cycle rotation tries to guess where the economy is heading. Momentum rotation holds the sectors that have been rising lately. Research on the first kind is weak, and the second kind has more support but still lags in some years.

## Key points

- A **sector** is a group of companies in the same line of business, like banks or drug makers.
- US stocks are usually split into 11 sectors under a system called GICS.
- Each sector has low-cost ETFs, so rotating no longer means picking single stocks.
- Business-cycle rotation depends on calling the economy's phase, which is hard to do in real time.
- Momentum rotation follows recent winners. It needs no forecast, but it can buy late and sell late.

## What is sector rotation?

Sector rotation is a strategy that shifts money from one stock market sector to another over time. The goal is to hold more of the sectors doing well and less of the ones doing poorly. It stays inside stocks, so it still falls when the whole market falls, unless the rule adds a way to step aside. Most rotation rules rank sectors with one of the [best indicators for trading](https://tactfolio.com/learn/best-indicators-for-trading.md): past returns.

The common map of sectors is the **Global Industry Classification Standard** (GICS). [MSCI](https://www.msci.com/indexes/index-resources/gics) and S&P Dow Jones Indices built it. It places each company into one of 11 sectors.

## The 11 sectors and their ETFs

Each GICS sector has a Select Sector SPDR fund that holds the S&P 500 companies in that sector, according to [State Street](https://www.ssga.com/us/en/intermediary/capabilities/equities/sector-investing/select-sector-etfs).

| Sector | Select Sector SPDR ETF |
| --- | --- |
| Communication Services | XLC |
| Consumer Discretionary | XLY |
| Consumer Staples | XLP |
| Energy | XLE |
| Financials | XLF |
| Health Care | XLV |
| Industrials | XLI |
| Materials | XLB |
| Real Estate | XLRE |
| Technology | XLK |
| Utilities | XLU |

An **ETF** (exchange-traded fund) is a fund that trades on an exchange like a stock. Our guide to [what an ETF is](https://tactfolio.com/learn/what-is-an-etf.md) explains how they work. The real estate and communication services funds are younger, launched in 2015 and 2018, so tests that need long histories often use the other nine.

## Business-cycle sector rotation

Business-cycle rotation is the idea that certain sectors lead in each phase of the economy. Fidelity's version, [published in April 2025](https://www.fidelity.com/viewpoints/investing-ideas/sector-investing-business-cycle), splits the cycle into four phases:

| Phase | What the economy does | Sectors Fidelity says have tended to lead |
| --- | --- | --- |
| Early cycle | Sharp recovery from a recession | Consumer discretionary, financials, real estate |
| Mid cycle | Moderate growth, the longest phase | Technology |
| Late cycle | Growth slows, inflation and rates rise | Energy, utilities |
| Recession | The economy shrinks | Defensive sectors such as utilities and health care |

Fidelity adds that no investment has behaved the same way in every cycle. The phases do not always come in order or last the same time.

The hard part is knowing which phase you are in. The phase is often clear only in hindsight. Molchanov and Stangl tested the idea in [The Myth of Business Cycle Sector Rotation](https://mro.massey.ac.nz/handle/10179/69590) in 2023. They found no evidence that sectors performed where popular belief expects. Any gain mostly vanished after trading costs and imperfect timing.

## Momentum-based sector rotation

Momentum rotation skips the forecast. It ranks sectors by their recent returns and holds the strongest. **Momentum** is the tendency of assets that have risen recently to keep rising for a while. Our guide to [momentum stocks](https://tactfolio.com/learn/momentum-stocks.md) explains the idea for single stocks, and the [momentum strategy guide](https://tactfolio.com/learn/momentum-strategy.md) shows how rotation rules use it.

Mebane Faber tested this on US sectors back to the 1920s in his 2010 paper [Relative Strength Strategies for Investing](https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1585517). He found that sectors that had led over the past few months to a year tended to keep leading for a while.

### A worked example

Say you rank three sector funds each month by their average return over the last 1, 3, 6 and 12 months.

- Technology: up 4%, 9%, 15% and 30%. Average: 14.5%.
- Energy: up 2%, 6%, 10% and 22%. Average: 10%.
- Utilities: down 1%, up 2%, 3% and 8%. Average: 3%.

You hold the top two, technology and energy, half each. Next month you rank again. If utilities climb into the top two, they come in and the weakest goes out.

## Faber's sector rotation on Tactfolio

The [Faber sector rotation](https://tactfolio.com/strategies/faber-sector-rotation.md) classic follows Faber's paper. Each month it holds the three strongest of nine sector funds, a third each. When the S&P 500 is below its 10-month average, it moves everything to Treasury bills.

As of September 25, 2026, its hypothetical backtest from mid-2007 returned a little under 8% a year. The S&P 500 returned about 11%. The rotation's worst fall was about 22%, against more than half for the S&P 500.

The trend filter helped in 2008, when the rotation gained about 2% while the S&P 500 lost 37%. It also cost it. The rotation was flat in 2010 while the S&P 500 gained 15%. In 2023 it gained under 4% while the S&P 500 gained 26%. Since the 2010 paper, it has returned about 7% a year.

That 10-month rule is a form of [trend following](https://tactfolio.com/learn/trend-following.md), which moves to safer assets when prices turn down.

## Common mistakes

- **Trusting the cycle chart.** The phase is clear only in hindsight. By the time a recession is announced, markets have often moved.
- **Chasing last week's winner.** Very short lookbacks swap sectors often, and costs add up.
- **Forgetting the market risk.** Holding the best sector in a crash still means losing money, unless your rule can step aside.
- **Ignoring concentration.** Three sectors can trail badly when a few huge companies in other sectors drive the index, as in 2023.
- **Overlapping funds.** A sector fund and a broad index fund hold many of the same stocks.

## Try it on Tactfolio

You can open the Faber sector rotation, read every rule and see each year of its backtest, including the lagging ones. To try your own version, open the [strategy builder](https://tactfolio.com/builder) and use a Rank block. Rank the sector funds by a lookback such as 3-month return. Keep the top one, two or three, and add a trend filter if you want one. Strategies on US stocks and ETFs run on daily prices and hold long positions only. When you are ready, follow the steps to [automate a sector rotation](https://tactfolio.com/learn/automate-etf-rotation-strategy.md) in a paper account first.

## Common questions

### What is a sector rotation strategy?

It is a set of rules for moving money between stock market sectors over time. Some rules follow the business cycle. Others hold the sectors with the strongest recent returns.

### Does sector rotation work?

Business-cycle rotation has weak support in research, mostly because the cycle is hard to call in real time. Momentum-based rotation has more support, but it can trail the market badly in some years, as Faber's version did in 2023.

### What sectors do well in a recession?

Fidelity's research says defensive sectors, such as utilities and health care, have tended to hold up better in recessions. They still often lose money, only less than the market. Past patterns do not always repeat.

### How often should you rotate sectors?

Most published rules check once a month. Checking more often reacts faster but trades more, and each trade has a cost.

### What is a sector rotation ETF?

Some funds run a sector rotation rule inside one ETF. You can also build your own rotation with the 11 Select Sector SPDR funds. Read any fund's prospectus to see its exact rules and costs.

## Put it into practice

- [Automated trading](https://tactfolio.com/automated-trading.md): Run a rules-based strategy by itself each trading day, on paper or in your own Alpaca account.
- [Stock trading bot](https://tactfolio.com/bots/stock-trading-bot.md): Build a stock trading bot from rules you can read, backtest it on decades of US prices, and run it daily on paper or in your own Alpaca account.
- [Backtesting](https://tactfolio.com/backtesting.md): Free backtesting software for stocks, ETFs, and crypto perps.
- [XLC: State Street Communication Services Select Sector SPDR ETF](https://tactfolio.com/etf/xlc.md): What XLC holds, its 0.08% yearly fee, returns by year, its worst drop, and which Tactfolio strategies hold it.
- [XLY: State Street Consumer Discretionary Select Sector SPDR ETF](https://tactfolio.com/etf/xly.md): What XLY holds, its 0.08% yearly fee, returns by year, its worst drop, and which Tactfolio strategies hold it.
- [XLP: State Street Consumer Staples Select Sector SPDR ETF](https://tactfolio.com/etf/xlp.md): What XLP holds, its 0.08% yearly fee, returns by year, its worst drop, and which Tactfolio strategies hold it.

## Sources

- [GICS](https://www.msci.com/indexes/index-resources/gics), MSCI, accessed 2026-10-16
- [Select Sector SPDR ETFs](https://www.ssga.com/us/en/intermediary/capabilities/equities/sector-investing/select-sector-etfs), State Street Global Advisors, accessed 2026-10-16
- [Sector investing and the business cycle](https://www.fidelity.com/viewpoints/investing-ideas/sector-investing-business-cycle), Fidelity Viewpoints, April 16, 2025, accessed 2026-10-16
- [The Myth of Business Cycle Sector Rotation](https://mro.massey.ac.nz/handle/10179/69590), Molchanov and Stangl, International Journal of Finance and Economics, 2023, accessed 2026-10-16
- [Relative Strength Strategies for Investing](https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1585517), Mebane Faber, SSRN, 2010, accessed 2026-10-16
- [Faber sector rotation](https://tactfolio.com/strategies/faber-sector-rotation), Tactfolio, figures as of September 25, 2026, accessed 2026-10-16