four basic types of financial instruments 贴现债券( discount bond) A discount bond (also called a zero coupon bond) is a kind of bond that is bought at a price below its face value(at a discount), and the face value is repaid at the maturity date. 贴现债券也称零息债券,是以低于 面值的价格购入(贴现),到期日 按票面价值偿还的债券。• 贴现债券（ discount bond ） A discount bond (also called a zero￾coupon bond) is a kind of bond that is bought at a price below its face value (at a discount), and the face value is repaid at the maturity date. 贴现债券也称零息债券，是以低于 面值的价格购入（贴现），到期日 按票面价值偿还的债券。 four basic types of financial instruments