The Moment
You are building or reviewing your portfolio and need to decide: how much goes in bonds vs stocks? Bonds feel boring compared to stocks — lower returns, less excitement. But they serve a critical function that has nothing to do with returns.
Bonds are portfolio insurance. They reduce the magnitude of crashes, provide income, and give you money to rebalance into stocks when markets drop. The right bond allocation is not about maximizing returns — it is about building a portfolio you can hold through the worst times without selling.
The Framework
The simple rule: 110 minus your age = stock percentage - Age 25: 85% stocks / 15% bonds - Age 35: 75% stocks / 25% bonds - Age 45: 65% stocks / 35% bonds - Age 55: 55% stocks / 45% bonds - Age 65: 45% stocks / 55% bonds
When to hold fewer bonds (more aggressive): - You have a long time horizon (15+ years until you need the money) - You have stable income and will not need to sell during downturns - You have a genuine tolerance for seeing your portfolio drop 30-40% - You are in the accumulation phase and can add more during dips
When to hold more bonds (more conservative): - You are within 5 years of retirement or needing the money - You have low risk tolerance (a 20% drop would cause you to sell) - Your income is variable or insecure - You are drawing down the portfolio (taking withdrawals)
What Types of Bonds
For simplicity: A total bond market index fund (BND, VBTLX, AGG) provides broad diversification across government, corporate, and mortgage-backed bonds.
For tax efficiency: Hold bonds in tax-advantaged accounts (401(k), IRA). Bond interest is taxed as ordinary income — higher than the capital gains rate on stocks. Keeping bonds in retirement accounts shields the interest from annual taxation.
For high tax brackets: Municipal bonds (muni bonds) pay interest that is exempt from federal taxes (and often state taxes). In the 32%+ bracket, a 3.5% muni bond yield is equivalent to a 5.1% taxable yield.
For short-term needs (1-3 years): Short-term bond funds or Treasury bills. These have less interest rate risk than long-term bonds.
Run Your Numbers
See how different stock/bond allocations affect long-term growth and volatility.
Compound Growth Projector
What to explore next
- →How do I rebalance between stocks and bonds?
- →Should I use total bond market or Treasury bonds?
- →Where should I hold bonds — 401(k) or taxable?
Frequently Asked Questions
Do I need bonds if I am in my 20s?
A small allocation (10-20%) is still valuable — it provides rebalancing fuel during crashes. When stocks drop 30%, you sell bonds to buy cheap stocks. This mechanical rebalancing boosts long-term returns by 0.5-1% annually. Even young investors benefit from having something to sell into a downturn.
Should I use individual bonds or bond funds?
Bond funds for most investors. They provide instant diversification, liquidity, and professional management. Individual bonds make sense only for large portfolios ($500,000+) where you can build a bond ladder with specific maturity dates.