Lindt Shakes Chocolate's Usual Summertime Blues

A employee checks chocolates for defects on the production line at the Lindt & Sprüngli factory in Kilchberg, Switzerland Photograph by Gianluca Colla/Bloomberg

Pinning surprising earnings on unseasonably hot or cold weather makes sense for companies selling ice cream, air conditioners, beer, maybe even theme-park tickets. But chocolate?

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