This article is from the A Guide to Closed-End Funds (CEFs).
With a mutual fund, the price at which the individual investor can buy or sell shares is set at the NAV. With a CEF, the individual investor has opportunities to time his purchase and sale of shares that may increase his profits and minimize his risks.
Consider a CEF with a NAV of $10 that is trading at a 20% discount (that is, $8). Suppose the market moves substantially, say 50%, over a period of time, and the NAV of the fund tracks the market performance, moving from $10 to $15. This performance may cause a shift in investor sentiment and, assuming an extreme case, suppose the fund now trades at a 20% premium (that is, $18). An investor in the CEF would show a performance of 125% (from $8 to $18) over that period, even though the market and the NAV have moved only 50%. An investor in a mutual fund, not having the opportunity to buy at a discount and sell at a premium, would have only a 50% gain (this too, assuming that the fund was fully invested).
For an investor in mutual funds, such an opportunity to curtail risk is not available: if the NAV drops, the investor loses money.
The CEF investor may, if lucky, be provided with an unusual type of protection against sharp drops in the NAV: the market price often does not drop as sharply or as immediately, providing an opportunity to bail out with smaller losses. Look at the behavior of the Mexico Equity & Income Fund after the sudden devaluation of the peso.
 
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