Fortinet stock fell sharply on October 29, 2026. Revenue forecasts were bleak, and product growth slowed. Service revenue growth hit 13%, the lowest in years. This led to a sharp two-day fall in the stock price. Yahoo Finance all reported the decline. BofA Securities downgraded Fortinet, adding to concerns. The stock's drop indicates challenging conditions in the software sector. Other companies like ServiceNow are also experiencing challenges.