GMR Airports' proposed Non-Convertible Bonds (up to INR 1,500 Cr) received "CARE AA-; Stable" and "Crisil AA-; Stable" ratings. Crisil Ratings also upgraded its rating for the company's existing Non-Convertible Bonds (up to INR 5,900 Cr) from "Crisil A+; Stable" to "Crisil AA-; Stable."