SIGI vs. COST
SIGI (Selective Insurance Group, Inc.) and COST (Costco Wholesale Corporation) are both stocks. SIGI operates in Insurance - Property & Casualty (Financial Services), while COST operates in Discount Stores (Consumer Defensive). Over the past 10 years, SIGI returned 11.26%/yr vs 21.90%/yr for COST. At a 0.26 correlation, their price movements are largely independent.
Performance
SIGI vs. COST - Performance Comparison
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Returns By Period
In the year-to-date period, SIGI achieves a 11.58% return, which is significantly higher than COST's 10.63% return. Over the past 10 years, SIGI has underperformed COST with an annualized return of 11.26%, while COST has yielded a comparatively higher 21.90% annualized return.
SIGI
- 1D
- 0.14%
- 1M
- 1.92%
- YTD
- 11.58%
- 6M
- 9.04%
- 1Y
- 10.82%
- 3Y*
- 0.35%
- 5Y*
- 5.08%
- 10Y*
- 11.26%
COST
- 1D
- -0.01%
- 1M
- -7.48%
- YTD
- 10.63%
- 6M
- 12.24%
- 1Y
- -2.41%
- 3Y*
- 23.60%
- 5Y*
- 20.70%
- 10Y*
- 21.90%
SIGI vs. COST - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
SIGI Selective Insurance Group, Inc. | 11.58% | -8.79% | -4.58% | 13.66% | 9.67% | 24.02% | 4.48% | 8.24% | 5.11% | 38.15% |
COST Costco Wholesale Corporation | 10.63% | -5.39% | 39.62% | 49.00% | -19.05% | 51.82% | 32.67% | 45.70% | 10.60% | 22.37% |
Correlation
The correlation between SIGI and COST is 0.13, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.13 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.17 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.22 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.25 |
Correlation (All Time) Calculated using the full available price history since Sep 22, 1993 | 0.26 |
The correlation between SIGI and COST shifts across timeframes, from 0.13 (1 year) to 0.26 (all time), reflecting how their relationship changes across market environments.
Fundamentals
SIGI:
$7.46
COST:
$26.51
SIGI:
12.39
COST:
35.89
SIGI:
0.47
COST:
2.81
SIGI:
1.04
COST:
1.08
SIGI:
$5.41B
COST:
$293.59B
SIGI:
$1.66B
COST:
$11.12B
SIGI:
$801.50M
COST:
$12.48B
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Return for Risk
SIGI vs. COST — Risk / Return Rank
SIGI
COST
SIGI vs. COST - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Selective Insurance Group, Inc. (SIGI) and Costco Wholesale Corporation (COST). 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.
| SIGI | COST | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.49 | ||
| Sortino ratioReturn per unit of downside risk | +0.70 | ||
| Omega ratioGain probability vs. loss probability | 1.10 | 0.99 | +0.10 |
| Calmar ratioReturn relative to maximum drawdown | 0.60 | -0.16 | +0.76 |
| Martin ratioReturn relative to average drawdown | 1.06 | -0.35 | +1.41 |
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Drawdowns
SIGI vs. COST - Drawdown Comparison
The maximum SIGI drawdown since its inception was -63.06%, which is greater than COST's maximum drawdown of -53.39%. Use the drawdown chart below to compare losses from any high point for SIGI and COST.
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Drawdown Indicators
| SIGI | COST | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -63.06% | -53.39% | -9.67% |
Max Drawdown (1Y)Largest decline over 1 year | -18.18% | -15.14% | -3.04% |
Max Drawdown (3Y)Largest decline over 3 years | -30.46% | -20.74% | -9.72% |
Max Drawdown (5Y)Largest decline over 5 years | -30.46% | -31.40% | +0.94% |
Max Drawdown (10Y)Largest decline over 10 years | -48.39% | -31.40% | -16.99% |
Current DrawdownCurrent decline from peak | -11.81% | -13.06% | +1.25% |
Average DrawdownAverage peak-to-trough decline | -14.06% | -13.36% | -0.70% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 10.26% | 6.86% | +3.40% |
Volatility
SIGI vs. COST - Volatility Comparison
The current volatility for Selective Insurance Group, Inc. (SIGI) is 5.49%, while Costco Wholesale Corporation (COST) has a volatility of 6.51%. This indicates that SIGI experiences smaller price fluctuations and is considered to be less risky than COST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SIGI | COST | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.49% | 6.51% | -1.02% |
Volatility (6M)Calculated over the trailing 6-month period | 17.82% | 14.49% | +3.33% |
Volatility (1Y)Calculated over the trailing 1-year period | 30.12% | 18.95% | +11.17% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 27.40% | 22.73% | +4.67% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 28.85% | 21.98% | +6.87% |
Dividends
SIGI vs. COST - Dividend Comparison
SIGI's dividend yield for the trailing twelve months is around 1.81%, more than COST's 0.56% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
COST Costco Wholesale Corporation | 0.56% | 0.59% | 0.49% | 2.87% | 0.76% | 0.54% | 3.38% | 0.86% | 1.08% | 4.81% | 1.09% | 4.06% |
SIGI Selective Insurance Group, Inc. | 1.81% | 1.88% | 1.53% | 1.26% | 1.29% | 1.26% | 1.40% | 1.27% | 1.21% | 1.12% | 1.42% | 1.70% |
Financials
SIGI vs. COST - Financials Comparison
This section allows you to compare key financial metrics between Selective Insurance Group, Inc. and Costco Wholesale Corporation. 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
SIGI vs. COST - Profitability Comparison
SIGI - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Selective Insurance Group, Inc. reported a gross profit of 0.00 and revenue of 1.36B. Therefore, the gross margin over that period was 0.0%.
COST - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported a gross profit of -17.68B and revenue of 70.53B. Therefore, the gross margin over that period was -25.1%.
SIGI - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Selective Insurance Group, Inc. reported an operating income of 101.90M and revenue of 1.36B, resulting in an operating margin of 7.5%.
COST - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported an operating income of 2.82B and revenue of 70.53B, resulting in an operating margin of 4.0%.
SIGI - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Selective Insurance Group, Inc. reported a net income of 97.70M and revenue of 1.36B, resulting in a net margin of 7.2%.
COST - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported a net income of 2.19B and revenue of 70.53B, resulting in a net margin of 3.1%.
Frequently Asked Questions
SIGI and COST have a correlation of 0.13, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
COST has higher volatility (6.51%) compared to SIGI (5.49%). In terms of maximum drawdown, SIGI dropped -63.06% vs COST's -53.39%.
SIGI currently has the higher Sharpe Ratio (0.36 vs -0.13), 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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