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This chart shows Apple's new iPhones didn't wow consumers and that may hurt the stock

Thomas Franck

A data firm that specializes in tracking social media posts found that the number of people who intend to buy the new Apple products was the lowest measured since 2015. The last time purchase intent was this low for a Keynote event, Apple sales fell year-over-year for the first time in 13 years," LikeFolio founder Andy Swan wrote Thursday. The reaction to the unveiling of a new generation of iPhones this week was "lackluster" compared with prior new smartphone announcements, which could bode poorly for Apple AAPL 's stock, according to a data firm that tracks social media sentiment and market behavior.