Mutual funds claim that they employ fair value pricing to prevent active investors from trading on their beliefs that the funds’ net asset values are stale. Our results support the funds’ assertions. We estimate the returns from the following active strategy: buy international open end mutual funds that do not employ fair value pricing on days that the S&P500 index rises by a large amount, and/or sell them on days that the S&P500 index declines by a large amount. These active strategies significantly outperform pure buy-and-hold strategies. We conclude that international mutual funds should make greater use of fair value pricing.