Purpose: The purpose of this paper is to propose a new measure of portfolio activity, the modified turnover (MT), which represents the portion of the portfolio that the manager changes from one quarter to the next. Compared with the traditional turnover, the MT measure has a distinct...

Active Share is a popular measure of active management. However, it is not clear what drives Active Share. To improve our understanding, we decompose Active Share into Active Stock Selection (ASE) and Active Stock Weights (ASW). ASE captures portfolio weights in stocks outside the portfolio...

We propose a new measure of portfolio activity, the Modified Turnover, which represents the portion of the portfolio that the manager changes from one quarter to the next. Compared with the traditional turnover, our Modified Turnover measure relies on portfolio holdings and takes into account...

Interest in socially responsible investing (SRI) has skyrocketed within the mutual fund industry. Central to this development is whether SRI funds underperform conventional funds. Using a novel approach, we decompose mutual fund portfolios into socially responsible (green) and non-socially...

This paper studies the role of investors' optimism about future economic growth in their investment decisions. Based on simple intuition, we argue that investors base their future investment decisions not only on asset-specific information, but also on their expectations about future economic...

This paper examines whether investors' optimism about the future economic growth affects their future investment decisions. Drawing from the insights of the theoretical literature on investment behavior, we argue that investors base their future investment decisions not only on asset-specific...

Using U.S. equity mutual fund data, we show that portfolio pumping – an illegal trading activity that artificially inflates year-end and quarter-end portfolio returns – is more pronounced among single-managed than team-managed funds. The return inflation by team-managed funds is 45% lower...

We examine credit market responses to the linguistic tone of disclosures made in 10-Q/K fillings, controlling for the information content conveyed in the reports. Examining windows around quarterly filings, we find that uncertain tone levels are associated with changes in credit default swap...

We propose a new channel through which teamwork improves mutual fund activity: by offsetting individual manager overconfidence, teams mitigate excessive performance-induced trading (PIT). The predictions of our theoretical model are confirmed in the data. Team-managed funds trade less after good...