Herbalife slumped after quarterly results missed estimates. Revised revenue guidance was also below projections.
Markit's list of most shorted stocks announcing earnings this week includes several familiar consumer names.
It seems few investors are getting behind Twitter's stock as the micro-blogging company readies to report earnings Tuesday.
UBS posted a forecast-beating second-quarter net profit as it booked a $280 million charge to help settle litigation in Germany.
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