Bond (finance)

Lore & Background

The word 'bond' in English relates to the etymology of 'bind,' and its use in the sense of an instrument binding one to pay a sum to another dates from at least the 1590s. Bonds are issued in primary markets, most commonly through underwriting, where one or more securities firms or banks form a syndicate to buy the entire issue and resell it to investors. Government bonds are usually issued in an auction, where members of the public or market makers may bid. Historically, an alternative practice called a tap issue allowed a borrowing government authority to issue bonds over time at a fixed price, with volumes sold on a particular day dependent on market conditions. Bonds have features including principal (nominal, par, or face amount), maturity date, coupon (interest rate), yield, and credit quality. The coupon can be fixed or floating, with floating rate notes based on a money market reference rate such as LIBOR or SOFR. The yield to maturity is an estimate of total return if the bond is held to maturity and all payments are reinvested at that yield. Credit quality indicates the probability of default, with high-yield (junk) bonds rated below investment grade. The market price of a tradable bond is influenced by interest payments, capital repayment, quality, and comparable yields, and can be quoted as clean (excluding accrued interest) or dirty (including accrued interest).

Reader's Guide

Bonds are a foundational instrument in finance, serving as a primary means for governments, corporations, and other entities to raise debt capital. They provide investors with a relatively predictable income stream and, in the event of bankruptcy, bondholders have priority over stockholders, though they rank behind secured creditors. The distinction between bonds and stocks is fundamental: bondholders are lenders, not owners, and bonds typically have a defined maturity, whereas stocks remain outstanding indefinitely (except irredeemable bonds, which are perpetuities). The secondary market for bonds allows for liquidity, as ownership can be transferred, and bonds are identified by a unique 12-digit alphanumeric ISIN code. The variety of bond types—municipal, corporate, government—and features such as fixed or floating coupons, different maturities, and credit ratings enable tailored financing and investment strategies. The yield to maturity is a key metric for investors, though it is realized only if interest payments are reinvested at the same rate. Overall, bonds are essential for long-term investment financing and for managing the capital structure of issuers, while offering creditors a range of risk-return profiles.

Did You Know?

• The word 'bond' in this financial sense dates from at least the 1590s and relates to the etymology of 'bind'.
• Bonds are often identified by a 12-digit alphanumeric ISIN code that uniquely identifies debt securities.
• Historically, coupons were physical attachments to paper bond certificates, handed to a bank on the interest due date.
• An irredeemable bond is a perpetuity with no maturity date.