“[A/An] [agent/stockbroker/real estate agent/real estate broker/corporate officer/partner] owes what is known as a fiduciary duty to his [principal/client/corporation/partner]. A fiduciary duty imposes on [a/an] [agent/stockbroker/real estate agent/real estate broker/corporate officer/partner] a duty to act with the utmost good faith in the best interests of her [principal/client/corporation/partner].”
[CACI Jury Instructions [citations omitted]]