Rating agencies use simple alphanumeric symbols to convey credit ratings. For example, rating agencies assign credit ratings to debt obligations on three basic scales: the long‐term scale, the short-term scale, and the fixed deposit scale. AAA has the highest Credit rating by indicating the highest safety. A higher rating indicates timely servicing of debt obligations by the issuer and a lower amount of credit risk. Payback History Of Company: You must do a research and background study of the company, which is issuing the bond; after all, it is your money. Check if the company has any history of default on its payment. If so it is unwise to invest in these instruments. However, if the company has a good consistence history of repayment to its creditors then it is better to invest in the NCDs of that company. At Futurewise you get good credit-rated NCDs available in the market with our research.