Bonds are a type of security sold by governments and corporations, as a way of raising money from investors. From the seller’s perspective, selling bonds is therefore a way of borrowing money. From the buyer’s perspective, buying bonds is a form of investment because it entitles the purchaser to guaranteed repayment of principal as well as a stream of interest payments. Some types of bonds also offer other benefits, such as the ability to convert the bond into shares in the issuing company’s stock. The bond market tends to move inversely with interest rates because bonds will trade at a discount when interest rates are rising and at a premium when interest rates are falling.