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Zscaler Stock: Buy or Sell?

Parkev Tatevosian, CFAAug 17, 2026

Summary

Parkev highlights that Zscaler is currently down 20% year-to-date, making it a laggard in a cybersecurity sector where many competitors have seen triple-digit returns. Parkev notes that the company's revenue has grown from $100 million in 2017 to over $3.17 billion recently, though operating profit margins have plateaued at around -5%. Parkev emphasizes that this lack of consistent margin improvement is the primary reason why investors have lowered their valuation tolerance for the stock.

Parkev points out that the broader market for cybersecurity is expanding rapidly as artificial intelligence creates new security risks. Despite the negative price momentum, Parkev believes the stock is fundamentally attractive due to its low risk profile, indicated by a beta of 0.92. Parkev also notes that the current forward price-to-earnings ratio of 33 is near historical lows, providing a potential margin of safety for new investors.

ZS: Parkev argues that Zscaler is a buying opportunity because it is currently undervalued with a calculated fair value of $219 compared to its $179 market price. Parkev highlights that the forward P/E ratio has fallen to 33 from a peak of 80, representing one of the lowest entry points in the company's history. Parkev believes that while profitability has stalled, the company's robust revenue growth and AI industry tailwinds make it a strong candidate for future momentum.
PANW: Parkev recently downgraded Palo Alto Networks following its massive share price increase earlier this year. Parkev advises investors who saw triple-digit gains to consider taking profits at these elevated valuation levels rather than holding for further gains. Parkev suggests that the risk-reward profile is no longer as favorable as it was when Parkev initially recommended the stock as a buy.
FTNT: Parkev has also downgraded Fortinet after the stock experienced a significant rally of approximately 100%. Parkev states that it is a prudent time for investors to exit or reduce positions to lock in gains after such a rapid price ascent. Parkev prefers shifting focus to cybersecurity stocks like Zscaler that have not yet participated in the recent industry-wide surge.

Mentioned Stocks

FTNT
Sentiment: SELLAction: RECOMMENDED

Reasoning: Parkev advised investors to take profits on Fortinet because the stock price has jumped approximately 100% since Parkev's earlier recommendation. Parkev believes the valuation is no longer as attractive as it was previously. Parkev has downgraded the stock to focus on other opportunities in the sector with better remaining upside.

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PANW
Sentiment: SELLAction: RECOMMENDED

Reasoning: Parkev recommends taking profits on Palo Alto Networks after the stock price saw triple-digit growth earlier this year. Parkev notes that the valuation has soared significantly, leading Parkev to downgrade the rating. Parkev suggests that investors who followed previous buy recommendations should now look to secure their gains as the risk-reward ratio has shifted.

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ZS
Sentiment: BUYAction: RECOMMENDED

Reasoning: Parkev identifies Zscaler as an undervalued asset with a calculated fair value of $219 per share compared to its current price of $179. Parkev notes that the forward P/E has compressed significantly from 80 to 33, representing one of the lowest entry points in its history. Parkev also observes that while profitability improvement has hit a plateau at -5%, the tailwinds from AI-driven security risks provide a strong long-term thesis for the stock to eventually gain momentum.

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