BSX vs. PEN
BSX (Boston Scientific Corporation) and PEN (Penumbra, Inc.) are both stocks. Both operate in the Medical Devices industry within the Healthcare sector. Over the past 10 years, BSX returned 6.81%/yr vs 16.73%/yr for PEN. Their 0.39 correlation means their historical movements had little consistent relationship.
Performance
BSX vs. PEN - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, BSX achieves a -50.99% return, which is significantly lower than PEN's 3.31% return. Over the past 10 years, BSX has underperformed PEN with an annualized return of 6.81%, while PEN has yielded a comparatively higher 16.73% annualized return.
BSX
- 1D
- 1.59%
- 1M
- 3.52%
- 6M
- -50.04%
- YTD
- -50.99%
- 1Y
- -55.67%
- 3Y*
- -3.43%
- 5Y*
- 0.49%
- 10Y*
- 6.81%
- ALL TIME*
- 7.26%
PEN
- 1D
- 0.43%
- 1M
- 0.82%
- 6M
- -10.32%
- YTD
- 3.31%
- 1Y
- 32.17%
- 3Y*
- 2.49%
- 5Y*
- 3.82%
- 10Y*
- 16.73%
- ALL TIME*
- 21.13%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $1.03B | $866.01M | $1.00B | |
| $134.82M | $123.94M | $132.27M |
BSX vs. PEN - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BSX Boston Scientific Corporation | -50.99% | 6.75% | 54.51% | 24.94% | 8.92% | 18.16% | -20.50% | 27.96% | 42.56% | 14.61% |
PEN Penumbra, Inc. | 3.31% | 30.92% | -5.59% | 13.07% | -22.57% | 64.18% | 6.53% | 34.43% | 29.86% | 47.49% |
Correlation
The correlation between BSX and PEN is 0.52, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.52 |
Correlation (3Y) Balances recent behavior with more history. | 0.41 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.44 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.41 |
Correlation (All Time) Calculated using the full available price history since Sep 18, 2015 | 0.39 |
The correlation between BSX and PEN shifts across timeframes, from 0.39 (all time) to 0.52 (1 year), reflecting how their relationship changes across market environments.
Fundamentals
BSX:
$69.46B
PEN:
$12.63B
BSX:
$2.38
PEN:
$4.07
BSX:
19.67
PEN:
78.91
BSX:
0.44
PEN:
0.12
BSX:
3.39
PEN:
8.42
BSX:
2.70
PEN:
8.30
BSX:
$20.62B
PEN:
$1.50B
BSX:
$14.52B
PEN:
$1.02B
BSX:
$4.76B
PEN:
$210.86M
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
BSX vs. PEN — Risk / Return Rank
BSX
PEN
BSX vs. PEN - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Boston Scientific Corporation (BSX) and Penumbra, Inc. (PEN). 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.
| BSX | PEN | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -2.45 | ||
| Sortino ratioReturn per unit of downside risk | -4.25 | ||
| Omega ratioGain probability vs. loss probability | 0.66 | 1.26 | -0.61 |
| Calmar ratioReturn relative to maximum drawdown | -0.92 | 1.28 | -2.20 |
| Martin ratioReturn relative to average drawdown | -1.64 | 3.26 | -4.91 |
Loading charts...
Drawdowns
BSX vs. PEN - Drawdown Comparison
The maximum BSX drawdown since its inception was -89.15%, which is greater than PEN's maximum drawdown of -62.64%. Use the drawdown chart below to compare losses from any high point for BSX and PEN.
Loading charts...
Drawdown Indicators
| BSX | PEN | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -89.15% | -62.64% | -26.51% |
Max Drawdown (1Y)Largest decline over 1 year | -60.58% | -21.44% | -39.14% |
Max Drawdown (3Y)Largest decline over 3 years | -60.58% | -45.46% | -15.12% |
Max Drawdown (5Y)Largest decline over 5 years | -60.58% | -60.14% | -0.44% |
Max Drawdown (10Y)Largest decline over 10 years | -60.58% | -62.64% | +2.06% |
Current DrawdownCurrent decline from peak | -56.79% | -10.63% | -46.16% |
Average DrawdownAverage peak-to-trough decline | -38.83% | -17.49% | -21.34% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 33.75% | 8.43% | +25.32% |
Volatility
BSX vs. PEN - Volatility Comparison
Boston Scientific Corporation (BSX) has a higher volatility of 9.18% compared to Penumbra, Inc. (PEN) at 1.76%. This indicates that BSX's price experiences larger fluctuations and is considered to be riskier than PEN based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| BSX | PEN | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 9.18% | 1.76% | +7.42% |
Volatility (6M)Calculated over the trailing 6-month period | 33.80% | 7.28% | +26.52% |
Volatility (1Y)Calculated over the trailing 1-year period | 35.80% | 30.76% | +5.04% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 25.98% | 40.87% | -14.89% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 27.43% | 41.27% | -13.84% |
Dividends
BSX vs. PEN - Dividend Comparison
Neither BSX nor PEN has paid dividends to shareholders.
Financials
BSX vs. PEN - Financials Comparison
This section allows you to compare key financial metrics between Boston Scientific Corporation and Penumbra, 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
BSX vs. PEN - Profitability Comparison
BSX - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Boston Scientific Corporation reported a gross profit of 3.61B and revenue of 5.20B. Therefore, the gross margin over that period was 69.4%.
PEN - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Penumbra, Inc. reported a gross profit of 264.94M and revenue of 390.05M. Therefore, the gross margin over that period was 67.9%.
BSX - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Boston Scientific Corporation reported an operating income of 1.07B and revenue of 5.20B, resulting in an operating margin of 20.6%.
PEN - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Penumbra, Inc. reported an operating income of 41.04M and revenue of 390.05M, resulting in an operating margin of 10.5%.
BSX - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Boston Scientific Corporation reported a net income of 1.34B and revenue of 5.20B, resulting in a net margin of 25.7%.
PEN - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Penumbra, Inc. reported a net income of 34.81M and revenue of 390.05M, resulting in a net margin of 8.9%.
Frequently Asked Questions
BSX and PEN have a correlation of 0.52, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
BSX has higher volatility (9.18%) compared to PEN (1.76%). In terms of maximum drawdown, BSX dropped -89.15% vs PEN's -62.64%.
PEN currently has the higher Sharpe Ratio (0.89 vs -1.55), 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 BSX and PEN
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