“The Market” Isn't One Thing: Watching Sectors Take Turns
Python for programmers, prompts for data analysts. "The market was up 20% this year" is one of the most compressed sentences in finance. It blends technology companies, oil producers, banks, utilities, and drugmakers into a single number — as if they all moved together. They don't. Some years one corner of the market carries everything; other years that same corner drags. Traders call the pattern…
The market is not a single entity, but rather a collection of various sectors that do not always move in unison. Traders refer to this phenomenon as "sector rotation." To illustrate this, we will examine the performance of eleven SPDR sector ETFs from 2021 to the present. The best and worst sectors for each year are as follows:
- 2021: Energy (XLE) +53.3%, Communication (XLC) +16.0%
- 2022: Energy (XLE) +64.3%, Communication (XLC) -37.6%
- 2023: Technology (XLK) +56.0%, Utilities (XLU) -7.2%
- 2024: Communication (XLC) +34.7%, Materials (XLB) +0.2%
- 2025: Technology (XLK) +24.6%, Consumer Staples (XLP) +1.5%
- 2026 so far: Energy (XLE) +42.8%, Consumer Discretionary (XLY) -7.0%
In 2022, the best sector gained 64% while the worst lost 38%, creating a significant gap of over 100 percentage points within the same market and twelve-month period. This demonstrates that a single number representing the market's performance that year is an average of two entirely different experiences.
The performance of sectors changes year after year. For instance, the best sector in 2021 (Energy) was ranked #1 in 2022, but fell to #9 in 2023. Similarly, the worst sector in 2021 (Communication) was ranked #11 in 2022, but jumped to #2 in 2023. The winners and losers of one year often end up in different positions the following year, with last year's winners averaging roughly fourth place in the next year and last year's losers averaging sixth.
However, it is essential to consider that this analysis is based on a short six-year window, which may not be sufficient to prove any predictable patterns in sector rotation. Additionally, the window is further limited by the fact that calendar years are an arbitrary way to slice the data. Analyzing the same eleven sectors from July to July or quarter by quarter would likely produce different winners and losers.
Furthermore, the performance of sector ETFs may not fully represent the entire industry, as many ETFs are dominated by a handful of large companies. This means that a sector's strong performance may be largely attributed to the success of just a few companies.
In conclusion, the performance of individual sectors within the market is highly volatile and unpredictable. Chasing the previous year's best sector or avoiding the worst one can lead to subpar results if not executed in the current year's context. It is crucial to remember that the "market" is an average of various stories, and the order in which these stories unfold constantly reshuffles.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
