Fortinet stock fell sharply on October 29, 2026. Revenue forecasts were bleak, and revenue growth was stagnant. Service revenue growth hit 13%, the smallest in a long time. This led to a big two-day drop in the stock price. Barron's all reported the decline. BofA Securities downgraded Fortinet, adding to concerns. The stock's drop highlights difficult circumstances in the software sector. Other companies like ServiceNow are also struggling.