Feb 16 (Reuters) - National Australia Bank Ltd NAB.AX :
* Nab 2016 first quarter trading update NAB.AX
* Says common equity tier 1 (cet1) ratio was 10.1% as at 31 December 2015
* On a statutory basis, unaudited net profit attributable to the owners of the company for the December 2015 quarter was approximately $1.5 billion
* Quarter revenue increased approximately 2%
* The charge for bad and doubtful debts (b&dds) for the quarter fell 52% to $84 million
* Unaudited cash earnings for continuing were approximately $1.7 billion for December 2015 quarter, which is 3% above quarterly average of September 2015 HY
* Overall impact of the demerger and IPO, including the conduct indemnity, is estimated to reduce nab's cet1 capital ratio by 49 basis points"
* Source text for Eikon ID:nASX68m0z7