ZS vs S&P 500: Which Stock to Watch

For informational purposes only. Not financial advice. Past performance does not guarantee future results. Consult a qualified financial advisor before making investment decisions.

Last Updated: [DATE]

ZS vs. S&P 500: What this comparison is really about

Zscaler (ZS) and the S&P 500 do not belong to the same index. Buying ZS means choosing a single cybersecurity company over the collective earnings of 500 large-cap companies, and that is a genuine portfolio decision, not an overlap analysis.

No. As of the date of this writing, Zscaler (ZS) is not a member of the S&P 500. ZS trades on the NASDAQ exchange and is part of the NASDAQ-100 (QQQ) but does not currently meet S&P 500 inclusion criteria. This matters because it makes the comparison a true either/or allocation question: capital going into ZS is capital not going into SPY, VOO, or IVV.

This article covers ZS's performance record, valuation multiples, SaaS business health metrics, and risk profile against the S&P 500 benchmark, then closes with a decision framework matched to investor type.

ZS vs. S&P 500 at a glance

The table below summarizes the key differences between ZS and the S&P 500 (via SPY/VOO/IVV ETFs) across the metrics that matter most for an active vs. passive allocation decision.

All figures require verification at time of writing. ZS market cap fluctuates significantly with price movements.

What is Zscaler? Understanding the company behind the ticker

Zscaler is a cloud-native cybersecurity company that helps enterprises connect employees securely to applications and the internet without relying on traditional network hardware like firewalls or VPNs. Founded in 2007 by Jay Chaudhry, a serial cybersecurity entrepreneur who retains significant ownership in the company, Zscaler is listed on the NASDAQ exchange and generates recurring subscription revenue from enterprises and government agencies globally.

The Zero Trust model explained

Traditional network security works like a castle and moat: once a user is inside the network perimeter, the system trusts them automatically. Zero Trust rejects that model, requiring verification of every user, every device, and every connection request regardless of location. This approach became the standard response to mass remote work and cloud migration, where the old perimeter no longer exists. Zscaler delivers Zero Trust through two primary products: Zscaler Internet Access (ZIA) for secure internet connectivity and Zscaler Private Access (ZPA) for access to internal applications. Zscaler is a leading pure-play Zero Trust provider, though other vendors including Palo Alto Networks and Microsoft also offer Zero Trust solutions.

How Zscaler generates revenue

Zscaler earns money through annual subscription contracts priced by the number of users and products deployed across ZIA and ZPA, along with expanding platform modules. Annual Recurring Revenue (ARR) represents the annualized value of all active subscription contracts: the primary indicator of Zscaler's business momentum and predictable revenue base. Net Revenue Retention (NRR) measures the percentage of recurring revenue retained from existing customers over 12 months, including upsells and expansions but accounting for churn. An NRR above 100% means the existing customer base grows in revenue without a single new customer; Zscaler has historically maintained NRR above 120%, indicating strong upsell velocity within its installed base.

Zscaler reports GAAP net losses primarily because of significant stock-based compensation (SBC) expense, a non-cash charge that reduces GAAP earnings but does not represent actual cash leaving the business. SBC does dilute existing shareholders over time by increasing share count, which is a real economic cost even though it does not affect free cash flow.

Performance comparison: how ZS has measured up against the S&P 500

Since its March 2018 IPO, ZS has [outperformed/underperformed] SPY by approximately [X] percentage points on a total return basis, but the picture shifts substantially depending on the time window examined, particularly given the 70%+ peak-to-trough decline ZS experienced in 2022 (Source: Macrotrends ZS historical price data).

All return figures sourced from Yahoo Finance as of [DATE]. ZS total return = price appreciation only (no dividend). SPY total return includes dividend reinvestment. Verify all values at time of writing.

The 5-year window is particularly informative because it captures both ZS's 2021 peak and its 2022 correction, providing a more honest picture than any single favorable period. The since-IPO row anchors the comparison to March 2018; readers can independently verify this on Yahoo Finance ZS Key Statistics using any standard historical return tool.

The performance record across all windows tells a mixed story. ZS has delivered strong returns in favorable macro environments and severe drawdowns when conditions shifted. Cherry-picking any single period overstates the case in either direction.

Valuation comparison: is ZS expensive relative to the broad market?

ZS trades at a significant valuation premium to the S&P 500 average. The Price-to-Sales ratio (P/S) divides a company's market cap by its annual revenue and is the most relevant metric for ZS because GAAP net income is negative. ZS's current P/S of approximately [Xx] (Source: Yahoo Finance ZS Key Statistics, [Month Year]) compares to the S&P 500's historical average P/S of roughly 2-3x. That gap reflects ZS's faster revenue growth but also concentrates downside risk if that growth decelerates.

ZS's GAAP P/E is not meaningful because GAAP losses are driven by non-cash stock-based compensation. Non-GAAP P/E, which excludes SBC, is [X]x and reflects operational profitability.

EV/Revenue (Enterprise Value divided by trailing twelve months revenue) accounts for debt and cash and is preferred by many institutional investors over P/S alone; it sits alongside the P/S figure above for a complete picture.

For context, Palo Alto Networks (PANW), the larger and more GAAP-profitable cybersecurity peer, trades at lower valuation multiples, illustrating where ZS may be heading as it matures on the profitability curve. ZS's premium over the S&P 500 average is well-documented in the data. Whether it is justified depends on whether the company's revenue growth trajectory sustains at current levels.

Fundamental health check: what Zscaler's business metrics say

Whether Zscaler is profitable depends on which measure you use. By GAAP net income, ZS reports losses driven by non-cash SBC charges. By non-GAAP operating income (which strips out SBC), ZS has reached profitability. By free cash flow, the company generates positive and growing cash after operating expenses. These three measures tell different parts of the same story.

All figures sourced from Zscaler investor relations earnings releases and SEC filings as of [DATE]. Rule of 40 inputs use non-GAAP FCF margin and YoY revenue growth rate. Verify all values at time of writing.

Free Cash Flow margin is calculated as free cash flow divided by total revenue, measuring how efficiently a company converts revenue into actual cash after operating costs and capital expenditures. Unlike GAAP net income, FCF is unaffected by non-cash SBC charges. Zscaler's FCF margin has improved consistently and has reached above 20% in recent fiscal years, which is meaningful evidence that the GAAP losses do not reflect actual cash destruction.

ZS has consistently scored above 40 on the Rule of 40, a SaaS industry benchmark that adds a company's revenue growth rate to its FCF margin. Companies scoring above 40 balance growth and profitability at a sustainable level. ZS's score distinguishes it from unprofitable growth companies that burn cash without a path to efficiency, and the metric rarely appears in standard ZS comparison content, making it one of the clearest analytical differentiators in this analysis.

NRR above 120% means existing Zscaler customers expand their spending year over year without the company acquiring a single new logo. This reduces dependence on new customer acquisition to sustain revenue growth, which in turn improves the predictability of future ARR: a meaningful argument in favor of the valuation premium over the S&P 500 average.

Risk analysis: how much more volatile is ZS than the S&P 500?

ZS carries a Beta of approximately [X.X] based on 5-year monthly data (Source: Yahoo Finance ZS Key Statistics, [Month Year]), meaning it historically moves approximately [X]x as much as the S&P 500 in either direction. That risk profile became concrete in 2022, when ZS declined approximately 70%+ from its late 2021 peak while the S&P 500 fell roughly 25% over the same period.

Volatility and Beta: ZS amplifies market moves

Beta measures a stock's price sensitivity relative to the S&P 500: a Beta of 1.0 means the stock moves in lockstep with the index, while a Beta above 1.0 amplifies both gains and losses. ZS's Beta of approximately [X.X] means that if the S&P 500 falls 10%, ZS has historically fallen approximately [X]%. The upside amplification applies equally; ZS has delivered outsize gains during risk-on market environments. The S&P 500, by definition, carries a Beta of 1.0.

The 2022 case study: when high growth meets rising rates

From its late 2021 peak to its mid-2022 trough, ZS declined approximately 70%+, more than double the S&P 500's approximately 25% drawdown over the same period (Source: Macrotrends ZS historical price data). Maximum drawdown measures the largest peak-to-trough price decline a stock experienced over a given period: it quantifies the worst-case loss a buy-and-hold investor would have faced.

The macro mechanism was direct: the Federal Reserve's 2022 rate-hiking cycle increased the discount rate applied to future earnings. High-multiple growth stocks like ZS, whose valuations are based on earnings many years in the future, saw those theoretical earnings compressed in present-value terms far more severely than the value-oriented and dividend-paying stocks that anchor the S&P 500. When investors rotate capital from high-growth technology positions into value, energy, or financial sectors during rising rate environments, concentrated single-stock positions absorb amplified losses that a diversified S&P 500 index holding would spread across all sectors.

Recession risk carries a related but distinct concern. During economic contractions, enterprise IT budgets are among the first to face cuts, which can slow ARR growth and pressure ZS's revenue trajectory even without a rate-specific trigger.

Risk-adjusted returns: raw outperformance vs. volatility-adjusted performance

The Sharpe Ratio measures risk-adjusted return: specifically, how much excess return an investor earns per unit of volatility accepted. Even when ZS has generated strong absolute returns over a given period, its high Beta and historical drawdowns mean its risk-adjusted returns may be less compelling than the raw figures suggest. An investor who held ZS from late 2021 through mid-2022 and sold at the trough captured none of the prior gains. The volatility required to stay invested through ZS's corrections is a real cost that raw return numbers do not capture. For a verifiable Sharpe Ratio comparison, Portfolio Visualizer (portfoliovisualizer.com) allows backtesting ZS vs. SPY with full methodology disclosure.

ZS is a high-risk investment with high return potential. Investors who cannot sit through 50-70% drawdowns or who need their capital within five years should look elsewhere, as the historical record makes this risk concrete rather than theoretical.

The bull case for ZS: why it might beat the market

Bull case for ZS

• Zero Trust is a secular technology shift, not a passing trend
• Federal mandate (EO 14028) creates structurally recurring government revenue
• NRR above 120% means existing customers expand spending; ARR grows without new logo acquisition
• FCF margin expansion supports premium valuation; Rule of 40 score above 40 confirms business health
• Founder-led company with significant insider ownership and long-term incentive alignment

The most structurally durable bull thesis for ZS rests on a regulatory foundation that competitors in adjacent markets cannot replicate. Executive Order 14028, signed May 12, 2021, required U.S. federal agencies to adopt Zero Trust security architectures (Source: Executive Order 14028 on Improving the Nation's Cybersecurity, White House, 2021). The CISA Zero Trust Maturity Model created a compliance framework that effectively requires agencies to procure Zero Trust solutions from vendors in this category. Government and federal contracts represent a growing, high-value, and relatively sticky revenue segment that is structurally mandated rather than purely discretionary. EO 14028 does not mandate Zscaler specifically. It mandates Zero Trust architecture adoption broadly, and Zscaler competes for federal contracts against Microsoft, Palo Alto Networks, and others, but ZS is a leading provider in this mandated category.

Beyond the federal tailwind, Zscaler's management estimates a Total Addressable Market (TAM) of over $96 billion across its core product categories (Source: Zscaler Investor Day materials; note: TAM figures are management estimates and not independently verified). Capturing even a modest share of this market would represent revenue expansion well beyond ZS's current base. The NRR above 120% means existing customers are already expanding their spending, reducing the pressure on new logo acquisition to sustain growth.

ZS's Rule of 40 score of [X] (revenue growth % + FCF margin %) confirms that the company balances growth and cash generation at a level that distinguishes it from lower-quality growth companies that fail this benchmark. Jay Chaudhry's continued ownership stake and his role as the company's founder-CEO provide long-term incentive alignment that purely management-led companies often lack.

These catalysts represent a compelling bull thesis. The bear case deserves equal attention before drawing conclusions.

The bear case: when the S&P 500 wins

Bear case / Why the S&P 500 wins

• Premium valuation (high P/S) creates significant downside if revenue growth decelerates
• ZS fell 70%+ in 2022; the S&P 500 fell approximately 25% during the same period
• Macro sensitivity: rising interest rates disproportionately compress high-multiple growth stock valuations
• GAAP losses and share dilution from SBC are real costs to shareholders even if non-cash
• The S&P 500 has historically outperformed most active stock picks over 10+ year periods

ZS's most significant bear risk is the same feature that attracts growth investors: a valuation premium that leaves no margin for error if revenue growth decelerates. A P/S ratio of [Xx] is priced for sustained high growth. If ZS's revenue growth rate drops from 30%+ to 15%, the multiple is likely to compress significantly, producing losses even if the underlying business continues to grow. This dynamic played out directly in 2022.

The S&P 500 ETF requires no earnings monitoring, no competitive analysis, and no position sizing decisions. It tracks the collective performance of 500 companies, absorbing sector-specific shocks across a diversified base. That simplicity is not a consolation prize; it is a material advantage for investors who cannot or choose not to monitor individual stock developments across earnings cycles.

SBC dilution is a real shareholder cost even though it does not affect free cash flow. As Zscaler issues stock compensation, existing shareholders' ownership percentage decreases over time. This dilution is an economic cost that careful investors account for alongside raw earnings growth.

Investors considering a cybersecurity sector bet should also evaluate CrowdStrike Holdings (CRWD) as an alternative, since CRWD focuses on endpoint detection and response while ZS focuses on network and access security, serving an adjacent use case within the same high-growth cloud security investment category. Palo Alto Networks (PANW), the sector's largest pure-play by market cap, trades at more compressed multiples due to greater GAAP profitability, offering cybersecurity exposure with a lower valuation risk profile.

The bear case for ZS is substantial. The next section provides a clear framework for deciding which choice fits which investor.

Which should you watch? A decision framework by investor type

No single right answer exists here. The better choice between ZS and a SPY or VOO position depends on your risk tolerance, time horizon, and how you define portfolio success. The framework below segments the decision by investor profile rather than issuing a universal verdict.

Choose ZS if...

ZS may be the appropriate choice if your investment profile matches all four of the following conditions:

1. Your investment horizon is 5+ years with no need to access this capital in the near term.
2. You can hold through 50-70% drawdowns without panic-selling; the 2022 experience is the baseline, not an outlier.
3. You hold strong conviction in Zero Trust as a secular technology trend with years of adoption growth ahead.
4. ZS represents a satellite position of 5-10% of your portfolio alongside core S&P 500 index holdings, not your primary allocation.

Choose the S&P 500 (SPY/VOO) if...

SPY or VOO is the stronger default choice if any of the following conditions apply to your situation:

1. Capital preservation is a priority and a 50-70% temporary drawdown would affect your financial plans.
2. Your time horizon is under five years.
3. You lack the time or appetite to monitor individual stock earnings, competitive developments, and macro sensitivity.
4. Your portfolio is not yet fully diversified; establish a core index position before adding satellite single-stock exposure.

Consider both if...

A hybrid approach suits investors who want exposure to the Zero Trust growth thesis without abandoning diversification: a core S&P 500 ETF position (90-95% of the portfolio) alongside ZS as a 5-10% satellite position. For investors who decide ZS merits a satellite position, dollar-cost averaging (investing a fixed dollar amount at regular intervals rather than all at once) can reduce the risk of initiating a full position at a valuation peak in a stock known for sharp drawdowns. Note: dollar-cost averaging does not guarantee profit or protect against loss in a declining market.

Analyst consensus (verify at time of reading): As of [DATE], Wall Street analyst consensus on ZS stands at approximately [X] Buy ratings, [Y] Hold ratings, and [Z] Sell ratings, with a consensus price target of $[X] representing approximately [X]% upside/downside from the current price of $[X] (Source: Yahoo Finance, [Month Year]). Analyst price targets are forward-looking estimates and not guarantees of future performance. Consensus ratings change frequently; verify current figures before making investment decisions.

For the majority of retail investors, the S&P 500 via SPY or VOO remains the default position. ZS is worth watching as a satellite opportunity for high-conviction growth investors who have done the research, sized the position appropriately, and can tolerate the volatility the historical record clearly documents.

Frequently asked questions: ZS vs. S&P 500

Is Zscaler (ZS) a good stock to buy?

ZS may suit growth-oriented investors with a 5+ year horizon and high risk tolerance, but it carries significantly higher risk than the S&P 500. The decision depends on your investment profile, not on the company's growth story alone. For risk-averse or income-focused investors, the combination of a high P/S multiple, 70%+ drawdown history, and GAAP losses argues for caution or for maintaining index exposure. This article does not constitute financial advice; consult a qualified advisor before making investment decisions.

Has ZS stock outperformed the S&P 500?

The answer depends on the time window. Since its March 2018 IPO, ZS has returned approximately [X]% compared to SPY's [X]% over the same period (Source: Yahoo Finance, [Month Year]; verify at time of reading). Across shorter windows including the 3-year and 5-year periods, the result differs substantially because the 2022 drawdown falls within those frames. The full multi-period comparison table in the performance section above covers YTD, 1-year, 3-year, 5-year, and since-IPO windows.

Is Zscaler stock in the S&P 500?

No. As of the date of this article's last update, Zscaler (ZS) is not a member of the S&P 500 index. ZS is listed on the NASDAQ exchange and is part of the NASDAQ-100, but it does not currently meet S&P 500 inclusion criteria. This makes the ZS vs. S&P 500 comparison a genuine either/or portfolio decision rather than an index overlap analysis.

What is Zscaler's analyst price target?

As of [DATE], the Wall Street analyst consensus price target for ZS is approximately $[X] based on [N] analyst ratings (Source: Yahoo Finance, [Month Year]; verify before acting on this figure). Analyst price targets are forward-looking estimates and not guarantees of future performance. Consensus ratings change frequently, and this figure requires verification at the time any investment decision is being considered.

Is ZS a high-risk stock?

Yes. ZS carries significantly higher risk than the S&P 500 by conventional metrics. Its Beta of approximately [X.X] (5-year monthly) amplifies market moves in both directions. In 2022, ZS declined approximately 70%+ from its late 2021 peak while the S&P 500 fell approximately 25%. Additional risk factors include concentration risk (single stock vs. 500-company diversification), valuation risk from a high P/S multiple, macro sensitivity to rising interest rates, and sector rotation dynamics that hit growth technology positions harder than the diversified index.

How has ZS performed since its IPO?

Since its March 2018 IPO, ZS has returned approximately [X]% compared to SPY's [X]% over the same period (Source: Yahoo Finance, [Month Year]; verify at time of reading). The March 2018 date is the anchor for this comparison, and readers can independently verify the figure using Yahoo Finance historical data. Performance across this full window includes both the 2020-2021 growth stock run and the 2022 correction.

What does Zscaler do?

Zscaler is a cloud-native cybersecurity company that uses Zero Trust architecture to connect users securely to applications and the internet without traditional VPN or firewall hardware. Enterprises and government agencies pay recurring annual subscription fees based on users and products deployed. Zscaler's two primary products are Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA), delivered entirely through the cloud.

Investment disclaimer

This article is for informational purposes only and does not constitute financial advice, investment advice, or a recommendation to buy or sell any security. Past performance is not indicative of future results. All investments involve risk, including the possible loss of principal. Always consult a qualified financial advisor before making investment decisions. All performance data and financial metrics cited in this article are as of [DATE] and are subject to change. Data sourced from Yahoo Finance, Zscaler Investor Relations, Macrotrends, SEC filings, and other sources noted inline.

Last Updated: [DATE]