Week 16 Day 6: Total Bond Market vs Individual Bonds

Individual bonds have a maturity date and return your principal. Bond funds do not -- they constantly buy and sell bonds, so their value fluctuates. But for simplicity and diversification, a total bond market fund is better for most investors. BND (Vanguard Total Bond Market) costs 0.03% and holds over 10,000 bonds.

When to use individual bonds vs. bond funds: Individual bonds: if you need a specific amount at a specific date (bond laddering for retirement income). You buy bonds maturing in each year you need income. You receive coupon payments and get your principal back at maturity. No interest rate risk if held to maturity. Bond funds: if bonds are your portfolio's stabilizer and you do not need specific maturity dates. Easier, cheaper, and more diversified. BND holds Treasuries, agency bonds, and investment-grade corporate bonds with an average duration of about 6 years. Alternatives: BNDX (international bonds), SCHZ (Schwab aggregate), AGG (iShares Core Aggregate). For inflation protection, VTIP (short-term TIPS) or SCHP (longer-term TIPS). For tax-free income, VTEB (municipal bonds). The simplest bond allocation for most investors: BND in tax-advantaged accounts, VTEB in taxable accounts (municipal bond interest is federally tax-free).

The individual bonds vs. bond funds debate centers on the concept of interest rate risk and whether it is real or illusory. Proponents of individual bonds argue that holding to maturity eliminates interest rate risk. This is true for nominal returns but ignores opportunity cost: if rates rise after you buy a bond, you are locked into below-market yields until maturity. Bond funds capture the new higher yields as they roll over maturing bonds. Over rolling periods longer than the fund's duration, the reinvestment benefit of higher rates eventually offsets the initial price decline. The crossover point (where rising rates become beneficial) equals approximately the fund's duration. For BND with duration 6, a rate shock becomes net-positive after about 6 years. The primary case for individual bonds (or defined-maturity bond ETFs like the Invesco BulletShares series) is for liability matching: when you need a specific dollar amount at a specific future date. Asset-liability matching eliminates both interest rate risk and reinvestment risk by perfectly matching cash flows. This is the basis of pension fund management and is equally applicable to individual retirement income planning.