Feb 5 (Reuters) - Westpac Banking Corp WBC.AX :
* COMMON EQUITY TIER 1 CAPITAL RATIO WAS 10.1% AT 31 DECEMBER 2017
* TOTAL RWA INCREASED $6.1 BILLION OR 1.5% THIS QUARTER
* HAS CEASED TO USE ITS PREFERRED RANGE FOR CET1 RATIO OF 8.75% TO 9.25% AS A GUIDE TO MANAGING CAPITAL LEVELS
* WILL REVISE ITS PREFERRED RANGE FOR CET1 RATIO ONCE APRA FINALISES ITS REVIEW OF CAPITAL ADEQUACY FRAMEWORK
* WESTPAC WILL SEEK TO OPERATE WITH A CET1 RATIO OF AT LEAST 10.5% IN MARCH AND SEPTEMBER