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    High short interest effect and aggregate volatility risk

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    barinovandwujuly2013.pdf (416.2Kb)
    Date
    2013-07
    Author
    Barinov, Alexander
    Wu, Julie
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    Abstract
    We propose a risk-based firm-type explanation on why stocks of firms with high relative short interest (RSI) have lower future returns. We argue that these firms have negative alphas because they are a hedge against expected aggregate volatility risk. Consistent with this argument, we show that these firms have high firm-specific uncertainty and option-like equity, and the ICAPM with the aggregate volatility risk factor can largely explain the high RSI effect. The key mechanism is that high RSI firms have abundant growth options and, all else equal, growth options become less sensitive to the underlying asset value and more valuable as idiosyncratic volatility goes up. Idiosyncratic volatility usually increases together with aggregate volatility, i.e., in recessions.
    URI
    http://hdl.handle.net/10724/36411
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