ZS vs. ROKU
ZS (Zscaler, Inc.) and ROKU (Roku, Inc.) are both stocks. ZS operates in Software - Infrastructure (Technology), while ROKU operates in Entertainment (Communication Services). Over the past 5 years, ZS returned -8.51%/yr vs -19.48%/yr for ROKU. Their 0.48 correlation means their historical movements had little consistent relationship.
Performance
ZS vs. ROKU - Performance Comparison
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Returns By Period
In the year-to-date period, ZS achieves a -32.78% return, which is significantly lower than ROKU's 33.66% return.
ZS
- 1D
- 1.89%
- 1M
- 3.24%
- 6M
- -24.40%
- YTD
- -32.78%
- 1Y
- -47.05%
- 3Y*
- -2.43%
- 5Y*
- -8.51%
- 10Y*
- —
- ALL TIME*
- 22.57%
ROKU
- 1D
- -0.06%
- 1M
- 3.20%
- 6M
- 52.32%
- YTD
- 33.66%
- 1Y
- 54.00%
- 3Y*
- 14.15%
- 5Y*
- -19.48%
- 10Y*
- —
- ALL TIME*
- 28.53%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
ROKU Roku, Inc. | $351.29M | $393.75M | $580.85M |
| $301.30M | $351.13M | $636.73M |
ZS vs. ROKU - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
ZS Zscaler, Inc. | -32.78% | 24.67% | -18.57% | 98.00% | -65.18% | 60.90% | 329.48% | 18.59% | 42.58% |
ROKU Roku, Inc. | 33.66% | 45.94% | -18.90% | 125.21% | -82.16% | -31.27% | 147.96% | 337.01% | -15.52% |
Correlation
The correlation between ZS and ROKU is 0.36, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.36 |
Correlation (3Y) Balances recent behavior with more history. | 0.43 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.51 |
Correlation (All Time) Calculated using the full available price history since Mar 16, 2018 | 0.48 |
The correlation between ZS and ROKU shifts across timeframes, from 0.36 (1 year) to 0.51 (5 years), reflecting how their relationship changes across market environments.
Fundamentals
ZS:
$24.45B
ROKU:
$21.51B
ZS:
-$0.48
ROKU:
$1.33
ZS:
7.61
ROKU:
4.42
ZS:
10.27
ROKU:
8.20
ZS:
$3.17B
ROKU:
$4.97B
ZS:
$2.43B
ROKU:
$2.19B
ZS:
$69.08M
ROKU:
$280.30M
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Return for Risk
ZS vs. ROKU — Risk / Return Rank
ZS
ROKU
ZS vs. ROKU - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Zscaler, Inc. (ZS) and Roku, Inc. (ROKU). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| ZS | ROKU | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.94 | ||
| Sortino ratioReturn per unit of downside risk | -2.70 | ||
| Omega ratioGain probability vs. loss probability | 0.87 | 1.24 | -0.37 |
| Calmar ratioReturn relative to maximum drawdown | -0.73 | 1.96 | -2.69 |
| Martin ratioReturn relative to average drawdown | -1.12 | 5.65 | -6.77 |
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Drawdowns
ZS vs. ROKU - Drawdown Comparison
The maximum ZS drawdown since its inception was -76.41%, smaller than the maximum ROKU drawdown of -91.91%. Use the drawdown chart below to compare losses from any high point for ZS and ROKU.
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Drawdown Indicators
| ZS | ROKU | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -76.41% | -91.91% | +15.50% |
Max Drawdown (1Y)Largest decline over 1 year | -64.89% | -27.69% | -37.20% |
Max Drawdown (3Y)Largest decline over 3 years | -64.89% | -51.65% | -13.24% |
Max Drawdown (5Y)Largest decline over 5 years | -76.41% | -90.79% | +14.38% |
Current DrawdownCurrent decline from peak | -59.00% | -69.76% | +10.76% |
Average DrawdownAverage peak-to-trough decline | -33.13% | -53.10% | +19.97% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 42.16% | 9.83% | +32.33% |
Volatility
ZS vs. ROKU - Volatility Comparison
Zscaler, Inc. (ZS) has a higher volatility of 14.07% compared to Roku, Inc. (ROKU) at 3.43%. This indicates that ZS's price experiences larger fluctuations and is considered to be riskier than ROKU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ZS | ROKU | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 14.07% | 3.43% | +10.64% |
Volatility (6M)Calculated over the trailing 6-month period | 58.81% | 34.40% | +24.41% |
Volatility (1Y)Calculated over the trailing 1-year period | 60.68% | 46.83% | +13.85% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 56.47% | 66.52% | -10.05% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 58.62% | 74.91% | -16.29% |
Dividends
ZS vs. ROKU - Dividend Comparison
Neither ZS nor ROKU has paid dividends to shareholders.
Financials
ZS vs. ROKU - Financials Comparison
This section allows you to compare key financial metrics between Zscaler, Inc. and Roku, Inc.. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
ZS vs. ROKU - Profitability Comparison
ZS - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Zscaler, Inc. reported a gross profit of 657.82M and revenue of 850.48M. Therefore, the gross margin over that period was 77.4%.
ROKU - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Roku, Inc. reported a gross profit of 564.94M and revenue of 1.25B. Therefore, the gross margin over that period was 45.2%.
ZS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Zscaler, Inc. reported an operating income of -29.64M and revenue of 850.48M, resulting in an operating margin of -3.5%.
ROKU - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Roku, Inc. reported an operating income of 51.77M and revenue of 1.25B, resulting in an operating margin of 4.2%.
ZS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Zscaler, Inc. reported a net income of -13.88M and revenue of 850.48M, resulting in a net margin of -1.6%.
ROKU - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Roku, Inc. reported a net income of 85.70M and revenue of 1.25B, resulting in a net margin of 6.9%.
Frequently Asked Questions
ZS and ROKU have a correlation of 0.36, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
ZS has higher volatility (14.07%) compared to ROKU (3.43%). In terms of maximum drawdown, ZS dropped -76.41% vs ROKU's -91.91%.
ROKU currently has the higher Sharpe Ratio (1.16 vs -0.78), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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