Zscaler Inc

ZSNASDAQ · USD
196.86USD-2.53 (-1.28%)
399

Zscaler Inc (ZS) Historical Volatility

ZS 30-day historical volatility is 76%. This ranks in the 88th percentile of readings over the past year.

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Tracking ZS historical volatility helps you see how much Zscaler 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, Zscaler Inc's HV tells you what really happened. Use our scanner to monitor ZS 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 ZS 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Zscaler 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.

Zscaler, Inc. operates as a cloud security company worldwide. The company provides Zscaler Internet Access solution that provides users, servers, operational technology, Internet of Things device secure access to externally managed applications, including software-as-a-service (SaaS) applications and Internet destinations; and Zscaler Private Access solution, which is designed to provide access to managed applications hosted internally in data centers, and private or public clouds. It also offers Zscaler Digital Experience that measures end-to-end user experience across business applications, as well as provides an easy to understand digital experience score for each user, application, and location within an enterprise.

In addition, the company provides workload segmentation solutions comprising Zscaler Cloud Security Posture Management that identifies and remediates application misconfigurations in SaaS, infrastructure as a service, and platform as a service to reduce risk and ensure compliance with industry and organizational benchmarks; and Zscaler Cloud Workload Segmentation, which is designed to secure application-to-application communications inside public clouds and data centers to stop lateral threat movement, as well as prevents application compromise and reduces the risk of data breaches. Its platform modules include Zscaler Central Authority, Zscaler Enforcement Node, and Zscaler Log Servers. It serves customers in airlines and transportation, conglomerates, consumer goods and retail, financial services, healthcare, manufacturing, media and communications, public sector and education, technology, and telecommunications services industries. The company was formerly known as SafeChannel, Inc., and changed its name to Zscaler, Inc. in August 2008. Zscaler, Inc. was incorporated in 2007 and is headquartered in San Jose, 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 Zscaler Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where ZS HV is running hot, cold, or in line. Make the ZS 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 28, 2026

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

As of September 28, 2026

See how volatility has moved over time

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

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