Darktrace shares fall after JPM starts coverage with 'underweight' rating

FILE PHOTO: A lock icon, signifying an encrypted Internet connection, is seen on an Internet Explorer browser in a photo illustration in Paris, France April 15, 2014. REUTERS/Mal Langsdon/File Photo

(Reuters) - Rising costs are likely to dent cyber security firm Darktrace's profit growth, J.P.Morgan analysts said on Tuesday, as they started coverage of the stock with an "underweight" rating.

J.P.Morgan is the only brokerage among seven to have an "underweight" rating, the equivalent of a "sell" rating, on the company's shares.