Who is this research for? Financial advisors, wealth managers, institutional investors, retail investors, mutual fund analysts, and policymakers interested in investor behavior and fund performance evaluation.
Top Answer
New research suggests that mutual fund investors may not be nearly as poor at market timing as commonly believed. By reexamining Morningstar’s widely cited “Mind the Gap” methodology, the study finds that much of the reported return shortfall may reflect how the metric is calculated rather than harmful investor behavior itself.
Executive Summary
This research from Dr. Jon Fulkerson (University of Dayton), Dr. Bradford Jordan (University of Florida), Dr. Timothy Riley (Department of Finance, Sam M. Walton College of Business, University of Arkansas), and Dr. Qing Yan (Towson University) reexamines Morningstar’s influential “Mind the Gap” study, which has frequently been interpreted as evidence that mutual fund investors significantly reduce their returns through poor market timing.
Using the same general sample period and fund categories as Morningstar’s 2025 report, the researchers analyze whether the widely cited “Return Gap” metric truly measures poor investor timing or whether it also captures statistical effects unrelated to investor decision-making. Drawing on prior behavioral finance research, the authors separate the portion of the Return Gap caused by investors buying before poor future returns from the portion created by investors simply moving money into funds after strong past performance.
The findings suggest that investor timing behavior may have a far smaller impact on aggregate investor wealth than commonly assumed. While Morningstar’s methodology reported a 1.2% annual return shortfall, the researchers estimate that actual poor timing behavior accounts for only about 0.10% annually. Overall, the study raises broader questions about how financial performance metrics are interpreted and communicated to investors, advisors, and the public.
Expert Insights: What is the industry impact of this research for investors, advisors, and the larger business community?
Why does the tendency of investors to “chase returns” not necessarily harm their long-term wealth?
Dr. Tim Riley explains: “Imagine a simple world where the performance of all mutual funds was random. In that world, an investor chasing past returns would tend to have a significant Return Gap, but we shouldn't expect that return chasing to have any impact on their wealth. Their wealth would be only a function of the future, random returns.”
→ Takeaway: A large Return Gap does not necessarily mean investors have reduced their long-term wealth through poor timing.
What should financial advisors and investors take away from the finding that timing costs may be smaller than previously believed?
Dr. Tim Riley adds: “While we do not find any evidence of significant positive returns to timing, our results do suggest that advisors and investors, in aggregate, should be less concerned that their current behavior is leading to significant losses in wealth.”
→ Takeaway: Investors and advisors may want to be cautious about assuming routine timing decisions are causing substantial portfolio damage.
How should industry professionals interpret studies like Morningstar’s “Mind the Gap” going forward?
Dr. Tim Riley notes: “The 'Mind the Gap' study should be interpreted with caution. Its results do not provide clean inferences on the cost of investor timing or of chasing past returns.”
→ Takeaway: Performance metrics can provide useful insights, but their limitations should be understood before drawing conclusions about investor behavior.
What can the business community at large learn from this research? How might these findings affect their operations?
Dr. Tim Riley notes: “Accurate beliefs are essential for strong decision making. In our case, the baseline for investors making a timing decision should not be that it tends to destroy significant value.”
→ Takeaway: Better decisions begin with accurate assumptions, making it important to challenge widely accepted beliefs when new evidence emerges.
Link to the Original Research
Published in Financial Analysts Journal (2026)
Frequently Asked Questions
Do mutual fund investors really hurt returns through poor timing?
This research suggests the impact may be much smaller than commonly believed. The study estimates that poor investor timing reduced annual returns by only about 0.10%, far below widely cited estimates based on the “Return Gap” metric.
What is the “Return Gap” in investing?
The Return Gap measures the difference between a fund’s reported returns and the returns investors actually experience after accounting for cash inflows and outflows. It is often used as a proxy for investor timing skill.
Why might the Return Gap overstate poor investor behavior?
The study argues that the metric captures not only the effects of future returns after investors buy or sell, but also a statistical “hindsight effect” tied to past fund performance. That means the measure may partially reflect how returns are calculated rather than harmful investor decisions alone.
Does this research mean investor timing never matters?
No. The researchers caution that some individual investors or specific funds may still experience meaningful timing-related losses. Their findings apply primarily to aggregate mutual fund investor behavior across the broader market.
What does this research mean for financial advisors?
The findings suggest advisors may want to interpret behavioral finance metrics carefully and avoid overstating the long-term damage caused by typical investor trading behavior. The study also highlights the importance of understanding how performance measures are constructed before drawing conclusions about investor skill.
