信用评级是指由国家认可的证券评信机构，按一定的指标对准备发行债券的还本付息的可靠程度作出公正客观的评定。债券履行偿还本金和支付利息义务的可靠性是通过债券的信用等级指标来表示的。债券评级的目的是将评定的债券信用等级指标公诸于众，以保护投资者的利益。债券信用? Credit rating refers to the credit rating agencies recognized by the state, according to certain indicators of the reliability of the debt to be issued bonds to make a fair and objective assessment. Bonds to fulfill the principal repayment of interest and the reliability of the obligation to pay is indicated by the bond credit rating indicators. The purpose of the bond rating is to make the credit rating indicators of the bonds public in public so as to protect the interests of investors. Bond credit?