COST vs. XLF

Last updated Jun 9, 2026

COST (Costco Wholesale Corporation) is a stock, while XLF (State Street Financial Select Sector SPDR ETF) is Financials Equities fund tracking the Financial Select Sector Index. Over the past 10 years, COST returned 22.25%/yr vs 12.79%/yr for XLF. At a 0.43 correlation, their price movements are largely independent.

Performance

COST vs. XLF - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Costco Wholesale Corporation (COST) and State Street Financial Select Sector SPDR ETF (XLF). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COST achieves a 13.35% return, which is significantly higher than XLF's -4.62% return. Over the past 10 years, COST has outperformed XLF with an annualized return of 22.25%, while XLF has yielded a comparatively lower 12.79% annualized return.

COST

• 1D: 0.30%
• 1M: -3.37%
• YTD: 13.35%
• 6M: 10.14%
• 1Y: -3.42%
• 3Y*: 25.18%
• 5Y*: 22.05%
• 10Y*: 22.25%

XLF

• 1D: -0.63%
• 1M: 1.42%
• YTD: -4.62%
• 6M: -1.98%
• 1Y: 2.91%
• 3Y*: 18.06%
• 5Y*: 8.47%
• 10Y*: 12.79%

*Multi-year figures are annualized to reflect compound growth (CAGR)

COST vs. XLF - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COST Costco Wholesale Corporation	13.35%	-5.39%	39.62%	49.00%	-19.05%	51.82%	32.67%	45.70%	10.60%	22.37%
XLF State Street Financial Select Sector SPDR ETF	-4.62%	14.90%	30.56%	12.03%	-10.59%	34.80%	-1.74%	31.88%	-13.06%	22.00%

Correlation

The correlation between COST and XLF is 0.08, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.08
Correlation (3Y) Calculated over the trailing 3-year period	0.28
Correlation (5Y) Calculated over the trailing 5-year period	0.36
Correlation (10Y) Calculated over the trailing 10-year period	0.34
Correlation (All Time) Calculated using the full available price history since Dec 23, 1998	0.43

Over the past year, the correlation between COST and XLF has dropped to 0.08 - well below their long-term average of 0.43, suggesting their price drivers have been diverging.

Return for Risk

COST vs. XLF — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

COST

COST Risk / Return Rank: 32
COST Sharpe Ratio Rank: 34
COST Sortino Ratio Rank: 28
COST Omega Ratio Rank: 28
COST Calmar Ratio Rank: 35
COST Martin Ratio Rank: 33

XLF

XLF Risk / Return Rank: 12
XLF Sharpe Ratio Rank: 12
XLF Sortino Ratio Rank: 12
XLF Omega Ratio Rank: 12
XLF Calmar Ratio Rank: 12
XLF Martin Ratio Rank: 12

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

COST vs. XLF - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Costco Wholesale Corporation (COST) and State Street Financial Select Sector SPDR ETF (XLF). 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.

	COST	XLF	Difference
Sharpe ratio: Return per unit of total volatility	-0.18	0.20	-0.38
Sortino ratio: Return per unit of downside risk	-0.13	0.37	-0.50
Omega ratio: Gain probability vs. loss probability	0.98	1.05	-0.06
Calmar ratio: Return relative to maximum drawdown	-0.22	0.20	-0.42
Martin ratio: Return relative to average drawdown	-0.51	0.51	-1.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

COST vs. XLF - Sharpe Ratio Comparison

The current COST Sharpe Ratio is -0.18, which is lower than the XLF Sharpe Ratio of 0.20. The chart below compares the historical Sharpe Ratios of COST and XLF, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	COST	XLF	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.18	0.20	-0.38
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.98	0.46	+0.52
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.02	0.58	+0.44
Sharpe Ratio (All Time) Calculated using the full available price history	0.59	0.21	+0.38

Drawdowns

COST vs. XLF - Drawdown Comparison

The maximum COST drawdown since its inception was -53.39%, smaller than the maximum XLF drawdown of -82.69%. Use the drawdown chart below to compare losses from any high point for COST and XLF.

Drawdown Indicators

	COST	XLF	Difference
Max Drawdown Largest peak-to-trough decline	-53.39%	-82.69%	+29.30%
Max Drawdown (1Y) Largest decline over 1 year	-15.38%	-14.79%	-0.59%
Max Drawdown (3Y) Largest decline over 3 years	-20.74%	-15.54%	-5.20%
Max Drawdown (5Y) Largest decline over 5 years	-31.40%	-25.81%	-5.59%
Max Drawdown (10Y) Largest decline over 10 years	-31.40%	-42.86%	+11.46%
Current Drawdown Current decline from peak	-10.93%	-7.38%	-3.55%
Average Drawdown Average peak-to-trough decline	-13.36%	-20.02%	+6.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.15%	5.71%	+1.44%

Volatility

COST vs. XLF - Volatility Comparison

Costco Wholesale Corporation (COST) has a higher volatility of 7.71% compared to State Street Financial Select Sector SPDR ETF (XLF) at 4.20%. This indicates that COST's price experiences larger fluctuations and is considered to be riskier than XLF based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COST	XLF	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.71%	4.20%	+3.51%
Volatility (6M) Calculated over the trailing 6-month period	14.53%	11.18%	+3.35%
Volatility (1Y) Calculated over the trailing 1-year period	18.79%	14.61%	+4.18%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.71%	18.66%	+4.05%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.95%	22.18%	-0.23%

Dividends

COST vs. XLF - Dividend Comparison

COST's dividend yield for the trailing twelve months is around 0.55%, less than XLF's 1.52% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COST Costco Wholesale Corporation	0.55%	0.59%	0.49%	2.87%	0.76%	0.54%	3.38%	0.86%	1.08%	4.81%	1.09%	4.06%
XLF State Street Financial Select Sector SPDR ETF	1.52%	1.31%	1.42%	1.71%	2.04%	1.63%	2.03%	1.87%	2.08%	1.48%	21.10%	1.95%

Frequently Asked Questions

Can I hold both COST and XLF in my portfolio?

COST and XLF have a correlation of 0.08, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COST or XLF?

COST has higher volatility (7.71%) compared to XLF (4.20%). In terms of maximum drawdown, COST dropped -53.39% vs XLF's -82.69%.

Which has better risk-adjusted returns?

XLF currently has the higher Sharpe Ratio (0.20 vs -0.18), 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.