Fiduciary
Fiduciary duties under Delaware corporate law

The duty of good faith requires control persons to exercise care and prudence in making business decisions—that is, the care that a reasonably prudent person in a similar position would use under similar circumstances. Control persons fail to act in good faith, even if their actions are not illegal, when they take actions for improper purposes or, in certain circumstances, when their actions have grossly inequitable results. The duty to act in good faith is an obligation not only to make decisions free from self-interest, but also free of any interest that diverts the control persons from acting in the best interest of the company. The duty to act in good faith may be measured by an individual's particular knowledge and expertise. The higher the level of expertise, the more accountable that person will be (e.g., a finance expert may be held to a more exacting standard than others in accepting a third party valuation).
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