e show that stocks are connected through the mutual fund owners they have in common. In particular, pairs of stocks that are connected in this fashion covary more together, controlling for exposure to systematic return factors, style and sector similarity, and many other pair characteristics. Evidence from a natural experiment—the 2003 mutual fund trading scandal—confirms that this relation is causal. Consistent with these findings, we further show that the general link between shared ownership and comovement is stronger for owners who are experiencing extreme flows in low-float stocks.
These results motivate a novel cross-stock-reversal trading strategy that exploits the information in ownership connections to generate annual abnormal returns of more than 9%. As a consequence, we provide a simple way to document the extent to which ownership-based connections result in equity market contagion. In an application, we document that the typical long-short hedge fund covaries negatively with our trading strategy (and more so than the typical mutual fund we initially study), suggesting that hedge funds on average may be part of the cause of the excess covariation and price dislocation that contagion from ownership-based connections generates.
e show that stocks are connected through the mutual fund owners they have in common. In particular, pairs of stocks that are connected in this fashion covary more together, controlling for exposure to systematic return factors, style and sector similarity, and many other pair characteristics. Evidence from a natural experiment—the 2003 mutual fund trading scandal—confirms that this relation is causal. Consistent with these findings, we further show that the general link between shared ownership and comovement is stronger for owners who are experiencing extreme flows in low-float stocks.These results motivate a novel cross-stock-reversal trading strategy that exploits the information in ownership connections to generate annual abnormal returns of more than 9%. As a consequence, we provide a simple way to document the extent to which ownership-based connections result in equity market contagion. In an application, we document that the typical long-short hedge fund covaries negatively with our trading strategy (and more so than the typical mutual fund we initially study), suggesting that hedge funds on average may be part of the cause of the excess covariation and price dislocation that contagion from ownership-based connections generates.
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