Asset allocation drives most of a portfolio’s long-term performance. But allocation isn’t static. Market movements shift your exposure over time, increasing some risks and reducing others. Rebalancing keeps your strategy intact, even as markets evolve.
How portfolios drift
As assets grow at different rates, weightings change:
- Equities that outperform start to dominate
- Defensive assets shrink in proportion
- Exposure to certain sectors or geographies concentrates unintentionally
Without rebalancing, your portfolio moves away from its original design. That can reduce diversification and increase volatility — especially in late-stage market cycles.
When to rebalance
There’s no one-size-fits-all approach, but two models work well:
- Calendar-based: adjust allocations at set intervals, typically once or twice a year
- Threshold-based: rebalance when an asset class deviates 5% or more from its target weight
The key is consistency. Reacting emotionally to performance creates drag. A disciplined schedule ensures you correct imbalances without overtrading.
How to rebalance with minimal friction
- Use dividends and contributions to bolster underweight allocations
- Review tax implications before selling appreciated assets
- Reassess your targets every 1–2 years to account for life changes or shifts in risk tolerance
You’re not just managing performance. You’re managing exposure. Over time, this structure supports more predictable outcomes.
Rebalancing doesn’t predict the market. It simply protects the strategy, allowing you to maintain control in both rising and falling conditions.
