A fiduciary duty is one of the strictest standards of conduct recognized in law. It arises when one party (the fiduciary) is entrusted with power, property, or discretion that affects another party (the beneficiary or principal). The fiduciary must subordinate personal interests to those of the beneficiary, avoid conflicts of interest, and exercise reasonable care.
Fiduciary relationships typically include:
- Trustees and beneficiaries of a trust
- Corporate directors and officers and their shareholders or the corporation itself
- Attorneys and their clients
- Agents and their principals
- Guardians and their wards
- Partners in a partnership
The two core components are usually framed as the duty of loyalty (no self-dealing, no secret profits, no conflicts) and the duty of care (acting with the prudence of a reasonably informed person). In U.S. corporate law, Delaware courts have shaped much of the modern doctrine through cases such as Meinhard v. Salmon (1928, New York), where Judge Cardozo described the standard as "not honesty alone, but the punctilio of an honor the most sensitive," and Smith v. Van Gorkom (1985), which clarified the duty of care for directors.
Breach of fiduciary duty can give rise to remedies including disgorgement of profits, rescission of transactions, constructive trusts, and damages. Unlike ordinary contractual obligations, fiduciary duties are equitable in origin and may persist even where no explicit agreement exists.
In international and public law, the concept appears more loosely. Scholars sometimes describe states' obligations toward their citizens, or trustee powers exercised under the former UN Trusteeship System (UN Charter Chapters XII–XIII), in fiduciary terms. The concept also underpins discussions of sovereign wealth fund governance and the responsibilities of public officials, though enforcement mechanisms in these contexts are typically political rather than judicial.
Example
In *Smith v. Van Gorkom* (1985), the Delaware Supreme Court held that Trans Union's directors breached their fiduciary duty of care by approving a merger after only a two-hour meeting without adequately informing themselves of the company's intrinsic value.
Frequently asked questions
The duty of loyalty prohibits self-dealing and conflicts of interest, requiring fiduciaries to act solely for the beneficiary's benefit. The duty of care requires them to act with the diligence and prudence of a reasonably informed person in similar circumstances.
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