APRA risk-weight floor hits big bank mortgage book
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Back in August, the Australian Prudential Regulatory Authority (APRA) issued a media release reaffirming that it would raise the banks’ average risk-weight on residential mortgages to 25%, as agreed following the Final Report of the Murray Financial System Inquiry (FSI).
Under the Basel Capital Adequacy Framework’s Advanced Internal Ratings-Based (IRB) approach, the major banks and Macquarie are permitted to use their own internal models to determine their risk-weighting and capital requirements.
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About the author

Leith van Onselen is Chief Economist at the MB Fund and MB Super. He is also a co-founder of MacroBusiness.
Leith has previously worked at the Australian Treasury, Victorian Treasury and Goldman Sachs.