Stocks vs Bonds
Understand the risk, return, and volatility dynamics between corporate equity ownership and fixed-income debt securities.
TL;DR
- Own business growth and corporate earnings by holding
stocks. - Lend capital for guaranteed predictable income by purchasing
bonds. - Balance portfolio volatility and capital growth using both
assetClasses.
Equity Ownership Dynamics
Corporate EquityHold direct fractional ownership in corporate business assets.
A stock represents partial ownership of a company.Historical Return PremiumEquities historically deliver roughly 10% nominal annual return.
Set historical return premium to 0.10.Price VolatilityEquity prices fluctuate daily based on market sentiment.
Set price volatility to minus 0.50.Fixed Income Creditor Dynamics
Creditor Debt ContractLend capital in exchange for scheduled coupon interest payments.
Set creditor debt contract to par value times coupon rate.Capital PreservationFull face par value returned upon reaching bond maturity date.
Set capital preservation to par value.Liquidation SeniorityBondholders get repaid before common stockholders in bankruptcy.
Bondholders get repaid before common stockholders in bankruptcy.Interest Rate Inverse Relationship
Rate Rise Price ImpactExisting bond prices drop when central banks raise benchmark rates.
Set rate rise price impact to minus duration times rate hike pct.Rate Cut Price SurgeExisting high-coupon bonds gain premium value when rates drop.
Set rate cut price surge to duration times rate drop.Yield to Maturity (YTM)Total annual return anticipated if bond is held until maturity.
Total annual return anticipated if bond is held until maturity.Portfolio Blending Strategies
Classic 60/40 SplitTraditional balanced portfolio delivering growth and drawdown stability.
Traditional balanced portfolio delivering growth and drawdown stability.Aggressive 90/10 SplitMaximizes compound growth for investors with 20+ year horizons.
Maximizes compound growth for investors with 20+ year horizons.Age-Based Rule of ThumbSubtract your age from 110 or 120 to set stock allocation.
Set age-based rule of thumb to 120 minus age.Tips
- Hold a higher percentage of
stocksduring your accumulation years to maximize long-term inflation-beating capital growth. - Add high-quality government
bondsas you approach retirement to dampen portfolio volatility and cushion market downturns.
Warnings
- Do not treat bonds as risk-free cash; rising interest rates cause existing
bondPricesto drop in secondary markets. - Holding zero equities out of fear exposes your portfolio to severe purchasing power erosion from long-term
inflation.
In Practice
Analyze portfolio volatility and ending value during a severe 30% equity market drawdown.
David holds $100,000 in 100% stocks. Sarah holds $100,000 in an 80/20 stock/bond split. Stocks drop 30%; bonds rise 5%.
- Calculate David's drawdown: $100,000 * (1 - 0.30) = $70,000 (a $30,000 portfolio loss).
- Calculate Sarah's stock portion: $80,000 * (1 - 0.30) = $56,000.
- Calculate Sarah's bond portion: $20,000 * (1 + 0.05) = $21,000.
- Calculate Sarah's total portfolio: $56,000 + $21,000 = $77,000 (a $23,000 loss, preserving $7,000 more).
Sarah preserves $7,000 more capital and rebalances bonds into cheap stocks at the bottom.
Bonds provide liquidity and psychological ballast to purchase discounted equities during severe market downturns.
FAQ
A stock represents fractional equity ownership in a corporation, whereas a bond is a debt instrument where you act as a creditor lending money for interest.
When new bonds issue at higher interest rates, existing bonds paying lower coupon rates become less attractive, forcing their market price down.
Yes. You can lose money if you sell a bond prior to maturity during a rising rate environment, or if the issuing corporate debtor defaults.