How Do I Rebalance My Portfolio?

Rebalancing is not about predicting markets.

It’s about restoring discipline.

Over time, market movements shift your portfolio away from its original allocation. Stocks may outperform bonds. International markets may lag. One sector may surge.

If left alone, your portfolio gradually drifts into a different risk profile than you intended.

Rebalancing corrects that drift.

Here’s how to do it properly.

Step 1: Know Your Target Allocation

Before rebalancing, you need a defined allocation.

Example:

• 70% stocks
• 30% bonds

Within stocks:

• 50% U.S.
• 20% international

Without a target, there is nothing to rebalance toward.

Allocation should reflect:

• Time horizon
• Risk tolerance
• Income stability
• Long-term goals

Rebalancing reinforces strategy. It doesn’t replace it.

Step 2: Measure Current Allocation

Review your current asset breakdown.

Example:

Target:

• 70% stocks
• 30% bonds

Current:

• 78% stocks
• 22% bonds

Stock outperformance has increased risk exposure.

This drift may not feel obvious — but it changes volatility.

Step 3: Decide on a Rebalancing Threshold

There are two common approaches:

Calendar-based
Rebalance once per year.

Threshold-based
Rebalance when allocation drifts by a certain percentage (for example, 5% or more from target).

Example:

If your 70% stock allocation rises to 75% or 76%, you rebalance.

Both approaches work. The key is consistency.

Step 4: Execute the Rebalance

Rebalancing involves:

• Selling overweight assets
• Buying underweight assets

In the example above:

• Sell some stocks
• Purchase bonds

This may feel counterintuitive — you’re trimming recent winners.

But rebalancing enforces discipline:

Sell high.
Buy lower.

It reduces the risk of unintended concentration.

Step 5: Consider Tax Efficiency

In taxable accounts, selling appreciated assets may trigger capital gains taxes.

To reduce tax impact:

• Use new contributions to buy underweight assets
• Rebalance inside tax-advantaged accounts (401(k), IRA) first
• Harvest losses where applicable

Tax awareness improves net outcomes.

Rebalancing is strategic — not reactive.

Why Rebalancing Matters

Without rebalancing:

• Risk gradually increases during bull markets
• Allocation drifts during sector surges
• Downturn exposure becomes larger than intended

A portfolio that starts at 70/30 could drift to 85/15 after a long stock rally.

That new allocation may not match your risk tolerance.

Rebalancing preserves your original strategy.

When You Might Not Need to Rebalance

If:

• Your allocation is already within target range
• Market movements are minor
• You’ve adjusted your target intentionally

Rebalancing should not be constant micromanagement.

Over-adjusting increases transaction costs and taxes.

Behavioral Benefit

Rebalancing also protects against emotional decision-making.

During strong markets:

• It prevents excessive risk accumulation.

During downturns:

• It encourages buying assets that have declined.

Systematic rebalancing removes guesswork.

Frequently Asked Questions

How often should I rebalance?

Annually is common. Some investors rebalance when allocations drift 5% or more.

Does rebalancing hurt returns?

Not necessarily. It may reduce extreme upside during surges but lowers downside risk during corrections.

Should I rebalance during market volatility?

Yes — if allocation has drifted materially from target.

Can I automate rebalancing?

Many retirement plans and robo-advisors offer automatic rebalancing features.

Bottom Line

To rebalance your portfolio:

Define your target.
Measure current allocation.
Set a threshold or schedule.
Sell overweight assets.
Buy underweight assets.

Rebalancing doesn’t predict the future.

It protects your intended level of risk — and keeps your strategy intact over time.

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