The prudent investor rule is a standard that investors commonly follow when making financial decisions. This rule requires that investors act with prudence and care with the assets they are investing. Synonyms for the prudent investor rule include the prudent man rule, the fiduciary rule, and the reasonable person rule. The prudent man rule is a similar standard, requiring that a person in a position of trust act with the care and caution that an ordinary, prudent person would exercise in the management of their own affairs. The fiduciary rule puts even more stringent standards on financial advisors and requires them to put their clients' interests ahead of their own. The reasonable person rule is a similar concept in legal terms, requiring people to act in ways that a reasonable person would in similar circumstances.