|  |  |  |  |  |  | 
 | Performing: |  |  |  |  |  | 
 | Credit rating AAA |  | 139,426 | - | - | 139,426 | 
 | Credit rating AA+ to AA- |  | 2,202,413 | - | - | 2,202,413 | 
 | Credit rating A+ to A- |  | 1,156,176 | - | - | 1,156,176 | 
 | Credit rating BBB+ to BBB- |  | 641,455 | - | - | 641,455 | 
 | Credit rating BB+ to BB- |  | 80,906 | - | - | 80,906 | 
 | Credit rating B+ to B- |  | 109,469 | - | - | 109,469 | 
 | Credit rating CCC+ to C |  | - | - | - | - | 
 | Non performing: |  |  |  |  |  | 
 | Credit rating D |  | - | - | 786 | 786 | 
 | Total gross carrying amount |  | 4,329,845 | - | 786 | 4,330,631 | 
 | Loss allowance |  | (7,311) | - | (50) | (7,361) | 
 | Carrying amount |  | 4,322,534 | - | 736 | 4,323,270 | 
 |  |  |  |  |  |  | 
 |  |  |  |  |  |  | 
 |  |  |  | 2019 |  |  | 
 | External rating grade |  | Stage 1 | Stage 2 | Stage 3 | Total | 
 |  |  |  MUR'000  |  MUR'000  |  MUR'000  |  MUR'000  | 
 |  |  |  |  |  |  | 
 | Performing: |  |  |  |  |  | 
 | Credit rating AAA |  | 40 | - | - | 40 | 
 | Credit rating BBB+ to BBB- |  | 3,535 | - | - | 3,535 | 
 | Credit rating BB+ to BB- |  | 205,048 | - | - | 205,048 | 
 | Credit rating B+ to B- |  | 347,710 | - | - | 347,710 | 
 | Credit rating CCC+ to C |  | - | 4,615 | - | 4,615 | 
 | Non performing: |  |  |  |  |  | 
 | Credit rating D |  | - | - | 796 | 796 | 
 | Total gross carrying amount |  | 556,333 | 4,615 | 796 | 561,744 | 
 | Loss allowance |  | (10,411) | (65) | - | (10,476) | 
 | Carrying amount |  | 545,922 | 4,550 | 796 | 551,268 |