Bonds are fixed-income debt securities issued by corporations, municipalities, and governments to raise capital. When you buy a bond, you are essentially lending money to the issuer in exchange for periodic interest payments (known as coupon payments) and the return of the bond's face value (par value) when the bond matures. Bonds are widely used to diversify investment portfolios and generate steady income.
A fundamental rule of bond investing is that bond prices and interest rates move in opposite directions. When market interest rates rise, newly issued bonds offer higher coupons, making existing bonds with lower coupons less valuable. As a result, the price of existing bonds falls, selling at a discount. Conversely, if market interest rates fall, existing bonds with higher coupon rates become more valuable and sell at a premium.
To see how fixed yields compare to deposit certificates, see our CD calculator or check our general interest rate tool.
Yield to Maturity (YTM) is the total return anticipated on a bond if it is held until the end of its lifetime. YTM is expressed as an annual rate and takes into account the bond's current market price, par value, coupon interest rate, and term to maturity. It assumes that all coupon payments are reinvested at the same rate. YTM is the standard metric used to compare the profitability of different bonds.
To calculate long-term compound growth of alternative equity investments, try our compound interest calculator or check our mutual fund calculator.
Understanding bond mathematics requires familiarity with key concepts: - Face Value (Par Value): The amount the issuer agrees to pay the bondholder at maturity, typically $1,000 for corporate bonds. - Coupon Rate: The annual interest rate paid by the issuer, usually divided into semi-annual payments. - Maturity Date: The date on which the issuer must repay the principal balance. - Current Yield: The bond's annual coupon payment divided by its current market price.
To plan your overall retirement savings and general portfolios, check our investment calculator or check our simple interest solver.
Let us look at a pricing example. Suppose a corporate bond has a face value of $1,000, a coupon rate of 5% paid annually, and 5 years remaining until maturity: - If the current market interest rate for similar bonds is 6%, investors will demand a 6% yield. - Because the coupon rate (5%) is lower than the market rate (6%), the bond must sell at a discount. - The discounted market price of the bond will be approximately $957.88, which brings its YTM up to the required 6%.
Not all bonds are created equal. Credit rating agencies (such as Moody's, S&P, and Fitch) evaluate issuers' creditworthiness. Investment-grade bonds have high ratings and low default risk, while high-yield bonds (junk bonds) carry higher default risk but offer higher coupon rates to compensate investors.
Municipal bonds, issued by local governments, are often exempt from federal income taxes, and potentially state and local taxes for residents. This tax-exempt status makes them highly attractive to investors in higher tax brackets.