QLYS vs. ISRG
QLYS (Qualys, Inc.) and ISRG (Intuitive Surgical, Inc.) are both stocks. QLYS operates in Software - Infrastructure (Technology), while ISRG operates in Medical Instruments & Supplies (Healthcare). Over the past 10 years, QLYS returned 13.25%/yr vs 19.48%/yr for ISRG. At a 0.37 correlation, their price movements are largely independent.
Performance
QLYS vs. ISRG - Performance Comparison
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Returns By Period
In the year-to-date period, QLYS achieves a -16.08% return, which is significantly higher than ISRG's -26.05% return. Over the past 10 years, QLYS has underperformed ISRG with an annualized return of 13.25%, while ISRG has yielded a comparatively higher 19.48% annualized return.
QLYS
- 1D
- -0.08%
- 1M
- 21.04%
- YTD
- -16.08%
- 6M
- -25.47%
- 1Y
- -19.42%
- 3Y*
- -4.49%
- 5Y*
- 2.20%
- 10Y*
- 13.25%
ISRG
- 1D
- 2.83%
- 1M
- -7.21%
- YTD
- -26.05%
- 6M
- -26.35%
- 1Y
- -24.94%
- 3Y*
- 9.67%
- 5Y*
- 8.61%
- 10Y*
- 19.48%
QLYS vs. ISRG - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
QLYS Qualys, Inc. | -16.08% | -5.22% | -28.56% | 74.89% | -18.21% | 12.60% | 46.18% | 11.55% | 25.93% | 87.52% |
ISRG Intuitive Surgical, Inc. | -26.05% | 8.51% | 54.72% | 27.14% | -26.15% | 31.76% | 38.39% | 23.43% | 31.23% | 72.64% |
Correlation
The correlation between QLYS and ISRG is 0.14, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.14 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.28 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.42 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.43 |
Correlation (All Time) Calculated using the full available price history since Oct 1, 2012 | 0.37 |
Over the past year, the correlation between QLYS and ISRG has dropped to 0.14 - well below their long-term average of 0.37, suggesting their price drivers have been diverging.
Fundamentals
QLYS:
$3.98B
ISRG:
$150.69B
QLYS:
$5.57
ISRG:
$8.24
QLYS:
20.02
ISRG:
50.83
QLYS:
0.61
ISRG:
3.11
QLYS:
5.89
ISRG:
14.31
QLYS:
6.98
ISRG:
8.56
QLYS:
$684.86M
ISRG:
$10.58B
QLYS:
$569.03M
ISRG:
$7.02B
QLYS:
$252.31M
ISRG:
$3.76B
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Return for Risk
QLYS vs. ISRG — Risk / Return Rank
QLYS
ISRG
QLYS vs. ISRG - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Qualys, Inc. (QLYS) and Intuitive Surgical, Inc. (ISRG). 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.
| QLYS | ISRG | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.38 | ||
| Sortino ratioReturn per unit of downside risk | +0.78 | ||
| Omega ratioGain probability vs. loss probability | 0.95 | 0.87 | +0.08 |
| Calmar ratioReturn relative to maximum drawdown | -0.39 | -0.78 | +0.39 |
| Martin ratioReturn relative to average drawdown | -0.81 | -1.56 | +0.75 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| QLYS | ISRG | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | -0.43 | -0.81 | +0.38 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.06 | 0.26 | -0.21 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.34 | 0.60 | -0.26 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.38 | 0.48 | -0.09 |
Drawdowns
QLYS vs. ISRG - Drawdown Comparison
The maximum QLYS drawdown since its inception was -68.48%, smaller than the maximum ISRG drawdown of -82.26%. Use the drawdown chart below to compare losses from any high point for QLYS and ISRG.
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Drawdown Indicators
| QLYS | ISRG | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -68.48% | -82.26% | +13.78% |
Max Drawdown (1Y)Largest decline over 1 year | -50.46% | -32.14% | -18.32% |
Max Drawdown (3Y)Largest decline over 3 years | -62.99% | -34.10% | -28.89% |
Max Drawdown (5Y)Largest decline over 5 years | -62.99% | -49.90% | -13.09% |
Max Drawdown (10Y)Largest decline over 10 years | -62.99% | -49.90% | -13.09% |
Current DrawdownCurrent decline from peak | -45.83% | -31.39% | -14.44% |
Average DrawdownAverage peak-to-trough decline | -20.85% | -21.27% | +0.42% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 23.94% | 16.02% | +7.92% |
Volatility
QLYS vs. ISRG - Volatility Comparison
Qualys, Inc. (QLYS) has a higher volatility of 15.85% compared to Intuitive Surgical, Inc. (ISRG) at 11.55%. This indicates that QLYS's price experiences larger fluctuations and is considered to be riskier than ISRG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| QLYS | ISRG | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 15.85% | 11.55% | +4.30% |
Volatility (6M)Calculated over the trailing 6-month period | 36.70% | 20.45% | +16.25% |
Volatility (1Y)Calculated over the trailing 1-year period | 45.47% | 30.96% | +14.51% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 39.93% | 33.17% | +6.76% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 39.08% | 32.38% | +6.70% |
Dividends
QLYS vs. ISRG - Dividend Comparison
Neither QLYS nor ISRG has paid dividends to shareholders.
Financials
QLYS vs. ISRG - Financials Comparison
This section allows you to compare key financial metrics between Qualys, Inc. and Intuitive Surgical, 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
QLYS vs. ISRG - Profitability Comparison
QLYS - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Qualys, Inc. reported a gross profit of 145.65M and revenue of 175.64M. Therefore, the gross margin over that period was 82.9%.
ISRG - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Intuitive Surgical, Inc. reported a gross profit of 1.83B and revenue of 2.77B. Therefore, the gross margin over that period was 66.1%.
QLYS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Qualys, Inc. reported an operating income of 60.89M and revenue of 175.64M, resulting in an operating margin of 34.7%.
ISRG - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Intuitive Surgical, Inc. reported an operating income of 855.30M and revenue of 2.77B, resulting in an operating margin of 30.9%.
QLYS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Qualys, Inc. reported a net income of 50.64M and revenue of 175.64M, resulting in a net margin of 28.8%.
ISRG - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Intuitive Surgical, Inc. reported a net income of 821.50M and revenue of 2.77B, resulting in a net margin of 29.7%.
Frequently Asked Questions
QLYS and ISRG have a correlation of 0.14, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
QLYS has higher volatility (15.85%) compared to ISRG (11.55%). In terms of maximum drawdown, QLYS dropped -68.48% vs ISRG's -82.26%.
QLYS currently has the higher Sharpe Ratio (-0.43 vs -0.81), 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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