fiduciary

“The judge sits in an advisory, almost fiduciary relationship with those who stand to benefit from the class action,” Wheeler said.

They also concluded that a car dealer had a "fiduciary duty" towards the car buyer when it came to arranging a car loan.

The lawsuit was filed as a derivative action in which shareholders sue a company’s officers and directors on behalf of the company, claiming they had breached their fiduciary duties.

A decision is expected any day from the U.S. 9th Circuit Court of Appeals on a federal judge’s ruling that the VA had failed a fiduciary duty to provide housing for veterans.

There's even this doctrine that everyone has a fiduciary duty to maximize value to the shareholder, which is an interesting thing to say, because it's pure ideology.