Performance fee
A performance fee is a fee that a client account or an investment fund may be charged by the investment manager that manages its assets. A performance fee may be calculated many ways. With respect to a separate account, it is often based on the change in net realized and unrealized gains, although in some cases, it can be based on other measures, such as net income generated. While not very common, some fund managers have attempted to link the performance fee to both upward and downward movement in a fund's gains, such as the shock absorber  fee, where the fund manager gets penalised (before the investor) for adverse movement in the fund value. With respect to hedge funds and other investment funds, it is generally calculated by reference to the increase in the clientfund's net asset value (or "NAV"), which represents the value of the fund's investments. Performance fees are widely used by the investment managers of hedge funds, which typically charge a performance fee of 20% of the increase in the NAV of the fund in addition to the base management fee. In the United States, performance fees charged by registered investment advisers  are subject to certain requirements under the Investment Advisers Act of 1940. In addition, performance fees may be charged to registered investment companies only under certain conditions. Finally, performance fees charged to pension plans governed by the Employee Retirement Income Security Act (ERISA) must also meet certain requirements. Worked example. An example might be as follows: An investor subscribes for shares worth $1,000,000 in a hedge fund. Over the next year the NAV of the fund increases by 10%, making the investor's shares worth $1,100,000. Of the $100,000 increase, 20% (i.e. $20,000) will be paid  to the investment manager, thereby reducing the NAV of the fund by that amount and leaving the investor with shares worth $1,080,000, giving a return of 8% before deduction of any other fees. High water marks. The highest NAV of a fund to date is known as the "high water mark". If the NAV of a fund declines during a year, no performance fee will be payable to the investment manager. If the NAV subsequently increases over the following year back to the high-water mark (but no higher), it would be objectionable for the investor to be charged  a performance fee on that increase because the investor has not yet made any return on its investment. Therefore, to address this concern, hedge funds will typically only charge a performance fee on increases in NAV over the high-water mark. This also applies to mutual funds though variably. Hurdles. A hurdle, in the context of a performance fee, is a level of return that the fund must beat before it can charge a performance fee. It may be a set percentage or it may be referenced to an index. The index would typically be either LIBOR (or an equivalent ) or an index reflecting the underlying market in which the fund is investing. The purpose of the latter is to reward the fund for generating returns that are better than the market (alpha) rather than for returns generated simply by movement in the market as a whole. If, in the worked example, there had been a hurdle of 4%, the performance fee would only have been charged on the additional 6% increase rather than the full 10% increase in NAV. As hurdles reduce the size of performance fees and reward successful active management, they are popular with investors. However, as  demand for hedge funds has been high in recent years, fewer hedge funds have needed to resort to their use to attract investors. Other fees. As well as a performance fee, a hedge fund will charge a management fee, typically calculated as 1.50% to 2% of the NAV of the fund, regardless of whether the fund has generated any returns for the investor. Hedge funds may also pay fees to administrators, prime brokers, lawyers, accountants and other service providers. Terminology. While this article uses the term "NAV" for simplicity, in reality a performance fee would be charged by reference to  the NAV "per share" (being the net asset value divided by the number of shares in issue). The NAV will fluctuate as investors subscribe for and redeem shares, whereas the NAV per share will only fluctuate as the underlying investments increase or decrease in value, making the latter the appropriate measure for calculating a performance fee. Where a hedge fund is structured as a limited partnership or unit trust, the terms "interest" and "unit" should be substituted for "share".