Equities - Efficient Capital Markets - Anomolies following, interest, general, applies, returns

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The neglected firms effect is a result of tests of the small firm effect. Small firm tests
also found that firms that have only a small number of analysts following them
have abnormally high returns. These excess returns appear to be caused by the lack
of institutional interest in the firms. The neglected firm effect applies to all sizes of
firms.

Why would there be excess returns if there is low analyst coverage? Shouldn't it be the other way around? Or is it that when there is a general sector "run" these neglected stocks "piggy back" off the run?