certainty equivalent(redirected from certainty)
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Related to certainty: Certainty equivalent
An amount that would be accepted today (risk free) in lieu of a chance to receive a possibly higher, but uncertain, amount.
The minimum sum of money a person would accept to forgo the opportunity to participate in an event for which the outcome, and therefore his or her receipt of a reward, is uncertain. For example, suppose you are told to draw one card from a full deck of cards. If you draw a red card you win $100 and if you draw a black card you win nothing. If you would accept $40 to forgo the selection and possibility of winning, $40 is the certainty equivalent of the outcome of the event. Certainty equivalents are used in evaluating risk.