Fortinet stock suffered a significant decline on October 29, 2026. Revenue forecasts were bleak, and sales growth was sluggish. Service revenue increased by 13%, the lowest in years. This led to a significant two-day decline in the stock price. Barron's all reported the decline. BofA Securities cut its rating for Fortinet, adding to concerns. The stock's drop highlights difficult circumstances in the software sector. Other companies like ServiceNow are also facing difficulties.