BUZZ - Citigroup downgraded Dropbox due to concerns about growth prospects, causing its stock price to drop afterwards.

September 24 - ** Shares of cloud platform provider Dropbox (DBX.O) fell 5% in pre-market trading to $32.5

** Citi downgraded the stock from "neutral" to "sell"

** Citi stated that the recent share price increase has outpaced the company’s fundamental business progress and growth prospects

** Citi noted that although recent performance has stabilized, the company's core business still faces pressure and has not shown sustained growth

** Of nine brokerages, one has a "buy" rating, four have "hold" ratings, and four have "sell" or lower ratings; the median target price is $29—data compiled by London Stock Exchange Group (LSEG)

** As of the previous trading day's close, the stock had risen 23.1% year-to-date

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