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 16.68%/yr vs 16.50%/yr for ISRG. Their 0.37 correlation means their historical movements had little consistent relationship.
Performance
QLYS vs. ISRG - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, QLYS achieves a 8.92% return, which is significantly higher than ISRG's -37.61% return. Both investments have delivered pretty close results over the past 10 years, with QLYS having a 16.68% annualized return and ISRG not far behind at 16.50%.
QLYS
- 1D
- 2.15%
- 1M
- -2.28%
- 6M
- 9.74%
- YTD
- 8.92%
- 1Y
- 10.89%
- 3Y*
- 1.25%
- 5Y*
- 7.34%
- 10Y*
- 16.68%
- ALL TIME*
- 19.72%
ISRG
- 1D
- 0.10%
- 1M
- -17.06%
- 6M
- -29.93%
- YTD
- -37.61%
- 1Y
- -26.86%
- 3Y*
- 2.94%
- 5Y*
- 1.35%
- 10Y*
- 16.50%
- ALL TIME*
- 21.88%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $1.43B | $1.49B | $1.19B | |
QLYS Qualys, Inc. | $105.16M | $113.24M | $96.03M |
QLYS vs. ISRG - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
QLYS Qualys, Inc. | 8.92% | -5.22% | -28.56% | 74.89% | -18.21% | 12.60% | 46.18% | 11.55% | 25.93% | 87.52% |
ISRG Intuitive Surgical, Inc. | -37.61% | 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 0.12, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.12 |
Correlation (3Y) Balances recent behavior with more history. | 0.26 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.41 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.42 |
Correlation (All Time) Calculated using the full available price history since Sep 28, 2012 | 0.37 |
Over the past year, the correlation between QLYS and ISRG has dropped to 0.12 - well below their long-term average of 0.37, suggesting their price drivers have been diverging.
Fundamentals
QLYS:
$5.10B
ISRG:
$124.82B
QLYS:
$5.59
ISRG:
$8.72
QLYS:
25.90
ISRG:
40.54
QLYS:
0.79
ISRG:
2.48
QLYS:
7.62
ISRG:
11.53
QLYS:
9.06
ISRG:
6.92
QLYS:
$684.86M
ISRG:
$11.03B
QLYS:
$569.03M
ISRG:
$7.36B
QLYS:
$252.31M
ISRG:
$4.18B
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
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.
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.
| QLYS | ISRG | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.92 | ||
| Sortino ratioReturn per unit of downside risk | +1.58 | ||
| Omega ratioGain probability vs. loss probability | 1.08 | 0.88 | +0.21 |
| Calmar ratioReturn relative to maximum drawdown | 0.17 | -0.61 | +0.78 |
| Martin ratioReturn relative to average drawdown | 0.36 | -1.40 | +1.76 |
Loading charts...
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.
Loading charts...
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% | -44.00% | -6.46% |
Max Drawdown (3Y)Largest decline over 3 years | -62.99% | -45.61% | -17.38% |
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 | -29.70% | -42.12% | +12.42% |
Average DrawdownAverage peak-to-trough decline | -21.00% | -21.36% | +0.36% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 24.16% | 19.01% | +5.15% |
Volatility
QLYS vs. ISRG - Volatility Comparison
The current volatility for Qualys, Inc. (QLYS) is 18.08%, while Intuitive Surgical, Inc. (ISRG) has a volatility of 20.49%. This indicates that QLYS experiences smaller price fluctuations and is considered to be less risky than ISRG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| QLYS | ISRG | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 18.08% | 20.49% | -2.41% |
Volatility (6M)Calculated over the trailing 6-month period | 41.71% | 28.02% | +13.69% |
Volatility (1Y)Calculated over the trailing 1-year period | 49.43% | 35.93% | +13.50% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 40.83% | 34.29% | +6.54% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 39.56% | 32.94% | +6.62% |
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 Aug 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 Aug 2026, Intuitive Surgical, Inc. reported a gross profit of 1.96B and revenue of 2.89B. Therefore, the gross margin over that period was 67.8%.
QLYS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 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 Aug 2026, Intuitive Surgical, Inc. reported an operating income of 971.90M and revenue of 2.89B, resulting in an operating margin of 33.6%.
QLYS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 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 Aug 2026, Intuitive Surgical, Inc. reported a net income of 818.10M and revenue of 2.89B, resulting in a net margin of 28.3%.
Frequently Asked Questions
QLYS and ISRG have a correlation of 0.12, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
ISRG has higher volatility (20.49%) compared to QLYS (18.08%). In terms of maximum drawdown, QLYS dropped -68.48% vs ISRG's -82.26%.
QLYS currently has the higher Sharpe Ratio (0.18 vs -0.75), 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.
Find the right allocation for QLYS and ISRG
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer