Oct 27 (Reuters) - Macquarie Group Ltd MQG.AX :
* Macquarie expects 2H18 result to be down on 1H18 and broadly in line with 2H17
* FY18 tax rate is currently expected to be broadly in line with 1H18
* Bank Group APRA Basel III common equity tier 1 capital ratio was 11.0 per cent (harmonised: 13.3 per cent) at 30 September 2017
* Group's result for FY18 is currently expected to be slightly up on FY17
* Expects combined net profit contribution from operating groups for year ending 31 March 2018 (FY18) to be slightly up
* Board has approved an on-market buyback of up to $A1 billion
* Buyback has received necessary regulatory approvals
* Glenn Stevens will be appointed to Macquarie Group Limited and Macquarie Bank Limited boards as an independent director
* Stephen Allen, chief risk officer and head of risk management group, will retire and step down from co's executive committee
* Patrick Upfold will succeed Allen as chief risk officer and head of RMG
* Alex Harvey will succeed Upfold as chief financial officer and head of FMG and will join executive committee