Direct Answer
The additional Common Equity Tier 1 (CET1) capital requirement is a prudential buffer mandated for D-SIBs above the standard Basel III capital requirements
| Bucket 4 | State Bank of India | 0.80% of RWAs |
| Bucket 2 | HDFC Bank | 0.40% of RWAs |
| Bucket 1 | ICICI Bank | 0.20% of RWAs |