It doesn't feel all that long ago that Australian banks were the envy of the world.

In March 2009, when stress-testing of US financial institutions drove the final spasm of the previous year's credit crisis, you could have bought all the shares in Citigroup, Royal Bank of Scotland Group and Barclays with their $US8.4 trillion ($11 trillion) of gross assets for less than you'd pay for the equity of Westpac, with $US347 billion of assets.

Long the envy of their peers around the world, Australia's banks have lost their lustre. Credit:Paul Jeffers

Commonwealth Bank of Australia's share price peaked six years later just a sliver south of three times the value of its net assets, an extraordinary level in a business where price-book ratios have struggled to break above one times over the past decade.

With the current royal commission inquiring into practices in the country's financial services industry and a slew of court cases, those high-flyers have come to earth with a bump. CBA on Monday agreed to pay $700 million to settle a money laundering case in which it admitted that a software update allowed about 54,000 reportable transactions to go unreported over a period of almost three years.