This study examines whether mutual funds herd in industries and the extent to which such herding
impacts industry valuations. Using two herding measures proposed by Lakonishok et al. (1992) and Sias
(2004) we document that mutual funds herd in industries. We show that industry herding is not driven
by fund flows and that it is not a manifestation of individual stock herding. We also find evidence indicating
that herding in industries by mutual funds is related to the industry momentum phenomenon first
documented by Moskowitz and Grinblatt (1999), but it does not drive industry valuations away from
their fundamentals.