Fortinet Inc

FTNTNASDAQ · USD
173.46USD0.00 (-2.92%)
6910

Fortinet Inc (FTNT) Historical Volatility

FTNT 30-day historical volatility is 52%. This ranks in the 87th percentile of readings over the past year.

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Tracking FTNT historical volatility helps you see how much Fortinet Inc's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Fortinet Inc's HV tells you what really happened. Use our scanner to monitor FTNT 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The FTNT 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Fortinet Inc's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.

Fortinet, Inc. provides broad, integrated, and automated cybersecurity solutions in the Americas, Europe, the Middle East, Africa, and the Asia Pacific. It offers FortiGate hardware and software licenses that provide various security and networking functions, including firewall, intrusion prevention, anti-malware, virtual private network, application control, web filtering, anti-spam, and wide area network acceleration. The company also provides FortiSwitch product family that offers secure switching solutions for connecting customers their end devices; FortiAP product family, which provides secure wireless networking solutions; FortiExtender, a hardware appliance; FortiAnalyzer product family, which offers centralized network logging, analyzing, and reporting solutions; and FortiManager product family that provides central and scalable management solution for its FortiGate products.

It offers FortiWeb product family provides web application firewall solutions; FortiMail product family that secure email gateway solutions; FortiSandbox technology that delivers proactive detection and mitigation services; FortiClient that provides endpoint protection with pattern-based anti-malware, behavior-based exploit protection, web-filtering, and an application firewall; FortiToken and FortiAuthenticator product families for multi-factor authentication to safeguard systems, assets, and data; and FortiEDR/XDR, an endpoint protection solution that provides both comprehensive machine-learning anti-malware execution and real-time post-infection protection. It provides security subscription, technical support, professional, and training services. It sells its security solutions to channel partners and directly to various customers in telecommunications, technology, government, financial services, education, retail, manufacturing, and healthcare industries. It has strategic alliance with Linksys. Fortinet, Inc. was incorporated in 2000 and is headquartered in Sunnyvale, California.

Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Fortinet Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where FTNT HV is running hot, cold, or in line. Make the FTNT 30 day historical volatility — and every other window — work for your edge instead of against it.

IV vs HV
Implied Volatility (IV) vs Historical Volatility (HV) over the past month.

As of September 25, 2026

IV - HV Difference
Difference between IV and HV over time. Positive values indicate IV > HV.

As of September 25, 2026

See how volatility has moved over time

Track FTNT historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.

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