Ross Asset collapse has highlighted the risks of controlling individuals' investments.
The investment watchdog says it is taking a vigilant approach to financial advisers who manage their clients' money on a discretionary basis since the Ross Asset Management collapse but can't rule out other cases of poor management.
More than half of the country's 2000 authorised financial advisers are permitted to provide a discretionary investment management service where they are supposed to provide day-to-day management of a client's investment portfolio and clearly identify the assets held for that person.
A spokesman for the Financial Markets Authority said people who invested with Ross Asset Management believed they were getting a discretionary service.
But so far receivers PwC have identified just $11.5 million of $449.6 million the Wellington financial adviser was believed to be controlling on behalf of 900 investors and do not expect to discover any more assets of consequence.