Equities are subject to much wider price swings than previously understood, according to a recent paper co-authored by Wharton finance and economics professor Robert Stambaugh. The research adds a new perspective to the work of Wharton finance professor Jeremy J. Siegel, author of the book Stocks for the Long Run, which says stock returns more than offset risks if you stay with the market through its ups and downs. In a recent interview with Knowledge@Wharton, the professors described their views about the market's long-term behavior.
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