| Division | Agency | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
|---|---|---|---|---|---|---|---|---|
| Corporate Bond | Korea Ratings | AA | AA- | AA- | - | - | - | - |
| NICE Investors Service | AA | AA- | AA | AA | AA | AA | AA | |
| Korea Investors Service | AA | AA- | AA | AA | AA | AA | AA | |
| Corporate Bill | Korea Ratings | - | - | - | - | - | - | - |
| NICE Investors Service | A1 | A1 | A1 | A1 | A1 | A1 | A1 | |
| Korea Investors Service | A1 | A1 | A1 | A1 | A1 | A1 | A1 |