This morning, I spoke to Geraldine Doogue on ABC Radio National's Saturday Extra program about the Australian corporate regulator's insider-trading, conflict-of-interest lawsuit against Citigroup.

To download or listen to it direct, click here or here.

It's also worth checking out my colleague Malcolm maiden's Round Table discussion on conflicts of interest with Australia's top investment bankers

Read between the lines: it's a sensitive issue.

If the Australian Securities and Investments Commission wins this case, it could be the defining moment for investment banks world-wide.