Sector Leadership Rotation
When last year's winner becomes this year's laggard
Sector leadership rarely persists beyond 2-3 years. The sector that leads one cycle typically underperforms in the next. This pattern supports systematic sector diversification over concentrated sector bets.
What history says
Editorial commentary written by ALAN analysts. Figures cited below are analyst-authored context — they are not derived from the chart above and may reflect different windows or sources.
An investor who annually rotated into the prior year's best-performing sector would have underperformed equal-sector-weight by approximately 2% per year since 1990.
Tech led 2010-2021. Energy led 2021-2022. These multi-year sector regimes make it tempting to concentrate — but the rotation is impossible to time.
A sector-diversified portfolio has historically experienced max drawdowns 5-10% shallower than a cap-weighted portfolio, because sector declines rarely synchronize perfectly.
Review whether your sector weights have drifted toward whatever led the last cycle; the recurring pattern of leaders becoming laggards argues for trimming back to a diversified sector mix on a set schedule instead of riding the reigning winner.