National Australia Bank (ASX:NAB) said that its common equity tier-1 (CET1) capital rose to AU$51.53 billion as of the quarter ended Sept. 30 from AU$51.14 billion a year earlier, according to a Thursday Australian bourse filing.

The CET1 capital declined by AU$1.5 billion compared with the previous quarter, primarily due to lower retained profits, partially offset by the quarter's net profit, along with a decrease in the foreign currency translation reserve from adverse foreign exchange movements.

The decline in the tier 1 capital resulted from the reduction in CET1 capital, along with the redemption of additional tier 1 capital instruments during the quarter.

The total capital increased to AU$89.51 billion as of Sept. 30 from AU$86.6 billion a year earlier, while the liquidity coverage ratio was 135%, compared with 137% a year ago, the report added.