Most mutual funds use day-old fund holdings but current-day prices to calculate net asset values. This practice, sanctioned under SEC Rule 2a-4, results in deviations between reported net asset values (NAVs) and returns and the economic values of those quantities. Using a sample of 26 funds'...

In this paper, we examine a little known aspect of mutual fund accounting, whereby funds do not use contemporaneous fund holdings to calculate net asset values. This practice, sanctioned under SEC Rule 2a-4, uses stale portfolio holdings and gives rise to deviations between reported net asset...