Adds dropped word in second bullet
** Cybersecurity firm Fortinet's FTNT.O shares down 1.7% at $79.88 premarket
** Scotiabank downgrades to "sector perform" from "sector outperform"
** Brokerage notes co's "upward cycle lasts ~6 quarters and then plateaus"
** "The current cycle is 5 quarters through, IE the juicy part of the upward cycle is likely close to cresting," Scotiabank says
** Avg. rating of 43 analysts is "hold;" their median PT is $87 - data compiled by LSEG
** Up to last close, stock has fallen 18.2% in last 12 months
(Reporting by Anhata Rooprai in Bengaluru)
((Anhata.Rooprai@thomsonreuters.com))