Bonds: Becoming the Lender Instead of the Borrower

So far you've mostly been the borrower — paying interest on loans. A bond flips that role: you lend money and collect the interest. When a government or company needs cash, it can issue a bond, which is essentially an IOU. You pay the face value (often $1,000) up front, and in return the issuer promises to pay you regular interest and return your principal on a set maturity date.

Those interest payments are called coupons. A bond with a 5% coupon rate on a $1,000 face value pays $50 a year, split into predictable installments. Because these payments are fixed and scheduled, bonds belong to a category called fixed income — the appeal is knowing roughly what you'll receive, which is why bonds are generally considered safer than stocks (recall that lenders get paid before owners).

Here's the twist that trips people up: once issued, bonds trade on a market, and their prices move opposite to interest rates. Suppose you own that $1,000 bond paying $50 a year. If new bonds start paying 7% ($70), no one will buy yours at full price — so its market price falls until the $50 it pays represents a competitive return for the buyer. If rates drop to 3%, your $50 bond looks generous, and its price rises.

This inverse relationship is the core mechanic of fixed income. Longer-maturity bonds swing more, because you're locked into that old rate for more years. So a bond isn't a risk-free 'set it and forget it' — its market value breathes with the interest-rate environment.