This thesis deals with evaluation of selected securities lending and specifically mortgage bonds. These bonds are attractive because of their low risk and therefore relatively certain revenue especially for conservative investors. The first part deals with the general presentation bonds and specific theoretical definition of mortgage bonds. It describes their issuance, trading, protection, development of the market for mortgage bonds, linking to the mortgage loans and then it represents issuers who provide mortgage bonds on the Czech market. The second part deals with the analysis and comparison of the returns currently offered bonds on the PSE. Their yield to maturity is monitored in relation to other properties of bonds, such as time to ...