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Bonds in a Portfolio

Bond Allocation by Goal

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Bond Allocation by Goal

Your bond allocation should match your time horizon. A goal five years away needs more bonds than a goal 25 years away—because you can't afford to wait for a market recovery.

Key takeaways​

  • Bonds are essential for goals within 5 years; equities are superfluous and risky
  • Goals 5–15 years away warrant 30–60% bonds, depending on how much volatility you can tolerate
  • Goals 15+ years away can hold 10–20% bonds; long time horizons reduce sequence-of-returns risk
  • Different accounts and goals can have different allocations; you don't need a single portfolio allocation
  • A multi-goal framework (college, house, retirement) often leads to higher equity exposure overall

The time horizon principle​

The core principle: bonds protect you from being forced to sell at a loss when you need the money. If you have a goal five years away and you hold 100% stocks, a 30% bear market in year 4 forces you to withdraw from a depleted portfolio. If you hold 40% bonds, that same bear market leaves your bond allocation intact, and you can withdraw from it, waiting for equities to recover.

This is different from the psychological ballast argument (bonds reduce portfolio volatility so you don't panic-sell). This is a hard math argument: if you have a specific goal on a specific date, bonds de-risk that goal.

Goals within 5 years​

If you're saving for a down payment, a car, or any goal within five years, bonds are essential. Equities are not appropriate because you cannot afford to wait for a recovery.

Recommended allocation: 80–100% bonds, 0–20% stocks.

The logic is straightforward. If you need $50,000 in four years and you're holding a stock-heavy portfolio, a bear market in year 3 could leave you with $35,000 when you need the money. You either postpone the goal, borrow, or accept a loss.

With bonds, that same bear market leaves your allocation roughly stable (bonds may fall 5%, not 30%), and you can meet your goal on schedule.

Examples:

  • Saving for a wedding in 18 months: 100% bonds (high-yield savings, money market, or short-term bond funds like SHV)
  • Saving for a car down payment in 3 years: 100% bonds or 80% bonds / 20% stocks
  • Saving for a house down payment in 5 years: 40–60% bonds, 40–60% stocks

For goals under two years, skip stocks entirely. High-yield savings accounts (HYSA) now offer 4–5% yields; you don't need equity exposure.

Goals 5–15 years away​

This is the middle zone where bond allocation depends on your specific risk tolerance. The time horizon is long enough that you could potentially recover from a bear market, but not so long that you can dismiss a loss as temporary.

Recommended allocation: 30–60% bonds, 40–70% stocks.

Examples:

  • College savings (for a child born in 2010, college starts in 2028–2029): This is a 3–4 year horizon for someone in 2026, so 70–80% bonds.
  • House savings (down payment in 10 years): 40–50% bonds.
  • Retirement savings starting at 40 (goal at 62–65): This depends on the person. If they have low risk tolerance, 50–60% bonds is appropriate. If they have high risk tolerance, 30–40% bonds works.

In this zone, the key question is: "If my portfolio fell 25% next year, how would I feel? Would I still make my goal?" If the answer is yes, hold more stocks. If the answer is no, hold more bonds.

A concrete example: You're 40, earning $100,000 annually, and want to retire at 62. You've saved $100,000 and plan to contribute $10,000 annually. Your goal is to reach $400,000 by 62. If your portfolio earns 6% annually (a 60/40 mix might target this), you'll reach your goal. If it earns 4% (a 40/60 mix), you'll reach roughly $340,000. The shortfall forces you to save more or work longer.

In this case, a 60/40 allocation is appropriate because you can absorb the shortfall (by saving more). But if you can't absorb it, you need a more conservative allocation.

Goals 15+ years away​

For long-term goals (retirement 20+ years away, children's college 15+ years away), you can afford to hold 70–90% stocks and 10–30% bonds.

The logic: a bear market early in your saving timeline gives you years to recover. If you're 30 and saving for retirement at 65, a 40% bear market in 2026 is painful, but you have 39 years to compound at 8%+ thereafter. The initial loss matters less than the subsequent growth.

Examples:

  • Retirement savings 25+ years away (age 30 saving for 55): 80–90% stocks, 10–20% bonds
  • Child's college 18+ years away (newborn, college starts 2044): 80–90% stocks, 10–20% bonds
  • Long-term wealth building with no specific date: 90–100% stocks (if you can tolerate volatility)

The 10–20% bond allocation here is not for returns; it's ballast and a rebalancing engine. When stocks fall, you rebalance (sell bonds, buy stocks), mechanically buying low. Over 20+ years, this rebalancing adds 0.5–1% annually to returns.

Multiple goals with different horizons​

Most people have multiple goals. You might be:

  • Saving for a house down payment (5 years away)
  • Building retirement savings (25 years away)
  • Contributing to your children's college (15 years away)

You don't need one portfolio allocation. Instead, you can bucket your investments by goal:

Bucket 1 (House down payment, 5 years): $50,000 in 80% bonds / 20% stocks

Bucket 2 (College for children, 15 years): $100,000 in 70% stocks / 30% bonds

Bucket 3 (Retirement, 25 years): $200,000 in 85% stocks / 15% bonds

Your overall allocation is 70% stocks and 30% bonds, but you've customized each bucket to its goal. This approach also provides psychological clarity: you know which assets are "safe" (bonds in the down-payment bucket) and which are "for growth" (stocks in the retirement bucket).

The relationship between goal horizon and bond allocation​

De-risking as your goal approaches​

A sophisticated approach: start with a stock-heavy allocation and gradually shift to bonds as your goal approaches. This is called a "glide path."

Example: College savings for a child born in 2010.

  • 2010 (0 years to goal): 85% stocks, 15% bonds
  • 2015 (5 years to goal): 70% stocks, 30% bonds
  • 2020 (10 years to goal): 50% stocks, 50% bonds
  • 2025 (5 years to goal): 30% stocks, 70% bonds
  • 2028 (1 year to goal): 10% stocks, 90% bonds
  • 2029 (goal reached): 100% cash (or 100% bonds for the next few years of college)

This approach captures long-term equity growth when the timeline is long, then de-risks as the deadline approaches. It's more effective than a static allocation because it balances growth and safety.

Target-date funds (like Vanguard's VTSAX with a target date of 2040) do this automatically, adjusting from 85% stocks at inception to 50% stocks at the target date.

Next​

You've sized your bonds by age and goal. Now we'll explore a third dimension: what to do when you have cash, bonds, and equities all competing for the same dollar—and how to choose between them.