what is a debt security 
a debt security is a debt instrument that can be bought or sold between two parties and has basic terms defined such as the notional amount the amount borrowed interest rate and maturity and renewal date examples of debt securities include a government bond corporate bond certificate of deposit cd municipal bond or preferred stock debt securities can also come in the form of collateralized securities such as collateralized debt obligations cdos collateralized mortgage obligations cmos mortgage backed securities mbss issued by the government national mortgage association gnma and zero coupon securities 1