When did it come into being?
The oldest known bond dates to 2400 BC, chiseled into a stone discovered at Nippur, a site in what was then Mesopotamia (present-day Iraq).
The longest-running bond in the world is that of the Hoogheemraadschap De Stichtse Rijnlanden, from 1624. This is a perpetual loan with an interest rate of 2.5 percent, issued nearly four hundred years ago, so that the water board could finance the repair of a dike. The Stichtse Rijnlanden still pays annual interest to bondholders of six other centuries-old bonds or letters of interest.
The interest on a bond is also called coupon (interest). This term can be traced back to the fact that a bond used to consist of two large sheets. From one of those sheets, you would cut a coupon (annually) and hand it in to the bank, which would then pay you the interest.
What else is involved?
Like a stock, a bond can also be traded. “If investor A has purchased a bond from the Dutch state, he can sell that bond on the market to investor B. Then the state owes interest and the borrowed amount to investor B. If interest rates rise, the price of a bond falls - and vice versa. “Say the Dutch state issues a bond of 100 euros for 10 years with a coupon rate of 2 percent. A possible rise in interest rates to 4 percent makes this bond with a 2 percent coupon less attractive. A bondholder would rather receive a higher interest rate on the money lent. To compensate for this, the price of the bond drops to, say, 80 euros. In contrast, the coupon payment remains the same; in this case 2 percent - 2 euros - on the amount originally lent. The price drop makes the value of the existing bond comparable to the value of the new bond.”
With government bonds, the creditworthiness of countries also plays a role. “Independent credit rating agencies determine this. The Netherlands, for example, but also the United States, currently has the highest rating: AAA. So, it is super safe to lend money to the Dutch government, because you will almost certainly get your money back. For countries with a lower credit rating, the likelihood that the bondholder will retrieve the lent money is considered to be slightly lower. As compensation, those countries therefore have to pay a higher interest rate on their government bonds.”