Shares in publicly traded mutual fund management companies have soared 54% this year, compared to approximately 5% for the Standard & Poor's 500 index, but that growth may be about to slow down as fund companies catch up on paying expenses they have been putting off, USA TODAY reports.

Fund companies have expenses to pay regardless of whether markets rise or fall, but because investors hate to pay fees when they're losing money, many fund companies made big cuts or delayed certain projects to keep these expenses as low as possible.

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