Commonwealth Bank of Australia has reported an increase in cash profit to $9.8 billion for the 2017 financial year, while its Perth-based subsidiary, Bankwest, delivered a fall in profit as a result of increased home loan impairments.

Commonwealth Bank of Australia has reported an increase in cash profit to $9.8 billion for the 2017 financial year, while its Perth-based subsidiary, Bankwest, delivered a fall in profit as a result of increased home loan impairments.