CI vs. MRK
CI (Cigna Corporation) and MRK (Merck & Co., Inc.) are both stocks. Both are in the Healthcare sector — CI in Healthcare Plans, MRK in Drug Manufacturers - General. Over the past 10 years, CI returned 9.13%/yr vs 11.61%/yr for MRK. At a 0.31 correlation, their price movements are largely independent.
Performance
CI vs. MRK - Performance Comparison
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Returns By Period
In the year-to-date period, CI achieves a 3.14% return, which is significantly lower than MRK's 15.10% return. Over the past 10 years, CI has underperformed MRK with an annualized return of 9.13%, while MRK has yielded a comparatively higher 11.61% annualized return.
CI
- 1D
- 4.28%
- 1M
- 2.41%
- YTD
- 3.14%
- 6M
- 5.75%
- 1Y
- -7.49%
- 3Y*
- 4.35%
- 5Y*
- 4.08%
- 10Y*
- 9.13%
MRK
- 1D
- 4.85%
- 1M
- 6.28%
- YTD
- 15.10%
- 6M
- 21.11%
- 1Y
- 59.23%
- 3Y*
- 5.24%
- 5Y*
- 13.69%
- 10Y*
- 11.61%
CI vs. MRK - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
CI Cigna Corporation | 3.14% | 1.72% | -6.27% | -7.97% | 46.68% | 12.29% | 1.83% | 7.70% | -6.46% | 52.29% |
MRK Merck & Co., Inc. | 15.10% | 9.79% | -6.26% | 1.01% | 49.42% | 1.75% | -7.20% | 22.27% | 39.95% | -1.49% |
Correlation
The correlation between CI and MRK is 0.35, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.35 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.28 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.32 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.33 |
Correlation (All Time) Calculated using the full available price history since Apr 1, 1982 | 0.31 |
Fundamentals
CI:
$74.10B
MRK:
$297.28B
CI:
$23.59
MRK:
$3.58
CI:
11.90
MRK:
33.55
CI:
0.69
MRK:
0.03
CI:
0.27
MRK:
4.57
CI:
1.76
MRK:
6.48
CI:
$277.94B
MRK:
$65.59B
CI:
$19.38B
MRK:
$49.79B
CI:
$10.03B
MRK:
$22.69B
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Return for Risk
CI vs. MRK — Risk / Return Rank
CI
MRK
CI vs. MRK - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Cigna Corporation (CI) and Merck & Co., Inc. (MRK). 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.
| CI | MRK | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -2.41 | ||
| Sortino ratioReturn per unit of downside risk | -3.23 | ||
| Omega ratioGain probability vs. loss probability | 0.99 | 1.38 | -0.39 |
| Calmar ratioReturn relative to maximum drawdown | -0.28 | 5.24 | -5.52 |
| Martin ratioReturn relative to average drawdown | -0.52 | 13.14 | -13.65 |
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
| CI | MRK | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | -0.23 | 2.18 | -2.41 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.14 | 0.58 | -0.44 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.30 | 0.51 | -0.21 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.34 | 0.48 | -0.14 |
Drawdowns
CI vs. MRK - Drawdown Comparison
The maximum CI drawdown since its inception was -84.34%, which is greater than MRK's maximum drawdown of -68.61%. Use the drawdown chart below to compare losses from any high point for CI and MRK.
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Drawdown Indicators
| CI | MRK | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -84.34% | -68.61% | -15.73% |
Max Drawdown (1Y)Largest decline over 1 year | -26.54% | -11.37% | -15.17% |
Max Drawdown (3Y)Largest decline over 3 years | -32.10% | -43.44% | +11.34% |
Max Drawdown (5Y)Largest decline over 5 years | -32.10% | -43.44% | +11.34% |
Max Drawdown (10Y)Largest decline over 10 years | -42.47% | -43.44% | +0.97% |
Current DrawdownCurrent decline from peak | -20.70% | -4.06% | -16.64% |
Average DrawdownAverage peak-to-trough decline | -18.82% | -18.84% | +0.02% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 14.49% | 4.52% | +9.97% |
Volatility
CI vs. MRK - Volatility Comparison
Cigna Corporation (CI) and Merck & Co., Inc. (MRK) have volatilities of 9.12% and 9.44%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| CI | MRK | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 9.12% | 9.44% | -0.32% |
Volatility (6M)Calculated over the trailing 6-month period | 18.67% | 18.19% | +0.48% |
Volatility (1Y)Calculated over the trailing 1-year period | 33.03% | 27.31% | +5.72% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 28.40% | 23.72% | +4.68% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 30.74% | 22.96% | +7.78% |
Dividends
CI vs. MRK - Dividend Comparison
CI's dividend yield for the trailing twelve months is around 2.19%, less than MRK's 2.76% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CI Cigna Corporation | 2.19% | 2.19% | 2.03% | 1.64% | 1.35% | 1.74% | 0.02% | 0.02% | 0.02% | 0.02% | 0.03% | 0.03% |
MRK Merck & Co., Inc. | 2.76% | 3.12% | 3.14% | 2.72% | 2.52% | 3.41% | 3.03% | 2.48% | 2.60% | 3.36% | 3.14% | 3.43% |
Financials
CI vs. MRK - Financials Comparison
This section allows you to compare key financial metrics between Cigna Corporation and Merck & Co., 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
CI vs. MRK - Profitability Comparison
CI - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Cigna Corporation reported a gross profit of 0.00 and revenue of 68.49B. Therefore, the gross margin over that period was 0.0%.
MRK - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Merck & Co., Inc. reported a gross profit of 13.34B and revenue of 16.29B. Therefore, the gross margin over that period was 81.9%.
CI - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Cigna Corporation reported an operating income of 2.36B and revenue of 68.49B, resulting in an operating margin of 3.4%.
MRK - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Merck & Co., Inc. reported an operating income of -1.88B and revenue of 16.29B, resulting in an operating margin of -11.6%.
CI - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Cigna Corporation reported a net income of 1.65B and revenue of 68.49B, resulting in a net margin of 2.4%.
MRK - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Merck & Co., Inc. reported a net income of -4.24B and revenue of 16.29B, resulting in a net margin of -26.0%.
Frequently Asked Questions
CI and MRK have a correlation of 0.35, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MRK has higher volatility (9.44%) compared to CI (9.12%). In terms of maximum drawdown, CI dropped -84.34% vs MRK's -68.61%.
MRK currently has the higher Sharpe Ratio (2.18 vs -0.23), 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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