ABSTRACT We examine changes in equity mutual funds' investment advisory contracts. We find substantial advisory compensation rate changes in both directions, with typical percentage fee shifts exceeding one‐fourth. Rate increases are associated with superior past market‐adjusted performance, whereas rate decreases reflect economies of scale associated with growth, and are not associated with extreme poor performance. There are within‐family spillover effects. Superior (e.g., star) performance for individual funds is associated with rate increases for a family's other funds. Rate reductions post‐2004 by family funds involved in market timing scandals do not have large industry spillover effects.