Bonds are designed to deliver both capital preservation and income, and are generally considered lower risk than stock investing. The purchase price of a bond is basically a loan to an issuer, such as the federal government, a municipal government, or a corporation. The term of the loan is determined for a specific period of time – referred to as the maturity date.

During that time, the issuer uses bond money to fund projects, and in return pays the buyer interest over the term of the loan. Once the term ends, the bond issuer pays back the money it borrowed (i.e., the purchase price). The interest is paid on a predetermined schedule – quarterly, semiannually, or annually. The interest rate on a bond is called the coupon rate, and it is fixed at the time of issuance and remains the same until the bond matures.

For example, say you purchase a 10-year bond for $10,000 with a coupon rate of 4 percent, paid twice a year.. Over the 10 years you’ll collect $4,000 in interest, and at maturity you get your $10,000 back. That’s a 40 percent cumulative return on the original investment.

Bonds with a maturity date of less than four years are considered short-term; between four and 10 years are considered intermediate-term bonds; and terms of 10 or more years are considered long-term bonds. Bonds can be useful in many ways, such as to provide income, save for a particular expense, or to seek out high interest rates for a higher total return. The following are a few bond strategies to address each type of objective.

Objective: Generate Income

To generate income over a long period of time – when interest rates tend to fluctuate – one strategy is to ladder bond holdings. This means purchasing a portfolio of individual bonds with varying maturity dates. For example, you may spread out your bond terms from one to 30 years – with each interval acting as a rung on this metaphorical ladder. Note that each type of bond is rated for the credit quality of the issuer, which reflects its likelihood of default. The lower the credit rating, the higher the interest paid to compensate for the issuer’s extra risk.

As each bond matures, you can reinvest money into another bond based on the current prices and coupon rates on offer at that time. This way you may continue to shop for higher coupon rates every few years without locking up all of your money for a 10-, 20-, or 30-year duration. When rates are on the rise, you can secure a higher yield as your bonds mature. If rates are falling, reinvest that money in a short-term bond as a holding pattern until coupon rates increase again. This way, you continue to benefit from owning longer-term bonds purchased when rates were higher. Barring any defaults, the ladder continues to grow and offer steady growth for bond assets.

Objective: Save for a Particular Expense

The Bullet strategy is a simple way to generate the money you need for a specific financial goal within a specific time frame – such as buying a house in five years, or saving for college or a retirement nest egg in 10 or 20 years. You basically purchase bonds with a similar maturity date. Between the purchase price and the generated income, you’ll know exactly how much you will receive when those bonds mature. It’s like shooting a bullet straight toward your financial goal.

Objective: Seek Higher Interest

The Barbell strategy splits your money between the two ends of the maturity range and skips the middle. You hold short-term bonds on one end and long-term bonds on the other, with little or nothing in between, much like the weights sitting at either end of a barbell.

The long end captures the higher coupon rates that generally come with committing money for a longer period. The short end keeps a portion of your money coming due on a regular basis, so each time one of those bonds matures, you can re-evaluate rates and decide where that money goes next. If rates have moved higher, shift it to the long end and lock in the better coupon. If rates remain tepid, buy another short-term bond and wait. The result is a portfolio that captures much of the yield available at the long end without committing everything to a rate you may later regret.

There are many different types of bonds, including federal government, municipal government, and corporate bonds. While government bonds are generally considered safe, each bond is issued a credit rating based on the issuer’s financial health, creditworthiness, and past history of repaying debt obligations. Investors also have the option to invest in bond funds, which offer a large selection of bonds and do not require investments to be held to maturity. However, bond fund interest rates fluctuate daily, and there is no guarantee the investor will receive the original principal amount when they cash out of the fund.