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A person or, more often, a bank or business who controls an investment portfolio on behalf of a client. Investment managers make investment decisions on behalf of the client in accordance to the parameters set by the client. The goal is to make the most profit for the client as possible. Some investment managers have more autonomy than others, depending upon the client's needs and desires. Institutional investment managers normally hire a team to work on the different accounts it has under management. Unlike brokers, investment managers are not paid on commission, but rather by a percentage of the total amount of money under management. This gives the investment manager an incentive to work for the client's profit, as the more money the manager accumulates, the more he/she/it makes. An investment manager is also known as a money manager or portfolio manager. See also: Advisory account, Discretionary account, Markowitz Portfolio Theory.