MELBOURNE (S&P Global Ratings) May 2, 2024--National Australia Bank Ltd. (NAB) should maintain its robust credit profile despite a A$1.5 billion share buyback. NAB (AA-/Stable/A-1+), one of Australia's four major lenders, today announced a 3.1% decrease in its cash earnings for the six months ended March 31, 2024, compared with the prior half. The results were solid and in line with our expectations. NAB's capital levels should remain strong in the next two years. Following the completion of the remaining A$200 million of its A$1.5 billion share buyback announced in August 2023 and the additional A$1.5 billion announced today, its pro forma common equity Tier 1 (CET1) ratio will be 11.75% as of March 31, 2024. This remains well above