Different methods for measuring mutual fund flows can lead to notably different inferences and predictions for investor behavior, fund performance, and asset prices. This article highlights the importance of using accurate, adjusted flow metrics.
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Abstract
Most studies estimate mutual fund flows using the change in total net assets in excess of fund returns. This estimate differs from funds’ reported flows due to variations in the treatment of reinvested distributions, timing of flows, fund mergers, and more. We review the literature on the determinants of mutual fund flows and the consequences of mutual fund flows on asset prices and firm behavior. We find that different flow measures can produce different inferences on key relationships in fund and securities markets, such as the relationship between investor flows and fund performance, and how fund flows impact security returns. We emphasize the tradeoffs of these different methodologies for understanding flow patterns in the fund marketplace and its broader consequences.