We characterize optimal mutual fund risk-taking strategies in competitive multi-period tournaments among multiple players. With multiple competitors, every player begins by taking maximum risk. In the final period, all players continue to take maximum risk except the leading player, who employs a “lock-in” strategy that depends on the magnitude of the lead. Our theory predicts the leader should strategically lock in advantage by reducing risk-taking if and only if the lead is great enough, rather than an increase in risk-taking by the trailers to try to catch up. Empirical evidence from style-adjusted mutual fund tournaments provides strong and robust support.