What Do Mutual Fund Managers Do? 
That is a great question ! A mutual fund manager is the person that is responsible for selecting the stocks or bonds , and the daily business of buying and selling them . These are the guys who make the large money off the market . They are paid a percentage of the money made , and so they buy and sell a lot . -LRB- According to Forbes , the average portfolio turnover in the 1950 's was 15 % . Today it ranges from 573-827 % . Any wonder why they are making money , and your costs have more than doubled ? -RRB- It is an excellent job , if you can get it . Thanks for asking ! 