Correlation Analysis
Costco Wholesale Corp vs Williams-Sonoma, Inc.
COST vs WSM
+0.925
Very strong positive
When one moves up, the other tends to follow.
Costco Wholesale Corp
↗COST
Founded in 1983, Costco Wholesale now operates a global chain of membership-based warehouse clubs, delivering high-quality goods and services at consistently low prices. As of its most recent fiscal year, Costco operated approximately 910 warehouses, serving more than 80 million members across its three geographic segments: Costco US (approximately 73% of total revenue), Costco Canada (13%), and Costco International (14%).Costco's core value proposition—quality products at unbeatable prices—has yielded consistently strong member renewal rates (93% in the US and Canada and nearly 90% internationally). About 55% of Costco's fiscal 2025 revenue came from its grocery offerings, and another 25% from general merchandise.
Market cap 451.9B
Williams-Sonoma, Inc.
↗WSM
With a retail and direct-to-consumer presence, Williams-Sonoma is a player in the nearly $300 billion domestic home category and $450 billion international home market, focused on expanding its exposure in the B2B ($80 billion total addressable market), marketplace, and franchise areas. Namesake Williams-Sonoma (152 stores) offers high-end cooking essentials, while Pottery Barn (183) provides casual home accessories. West Elm (120) is an emerging concept for young professionals, and Rejuvenation (13) offers lighting and house parts. Brand extensions include Pottery Barn Kids and Pottery Barn Teen (45) as well as Mark & Graham and GreenRow. Williams-Sonoma also has a business-to-business team that supports projects that range from residential to large-scale commercial.
Market cap 21.7B · 19,800 employees
Time Series
Relative Performance
Who Moves First
in sync
COST and WSM tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.925 (they moved in the same direction).
Do They Crash Together?
Correlation by Market Regime
How these series behave when markets are rising, falling, or diverging. A correlation that holds in drawdowns is very different from one that only works in rallies.
Both Rising
+0.398
15 periods · Return correlation when both series rose
Both Falling
+0.748
8 periods · Return correlation when both series fell
Diverging
-0.438
12 periods · Return correlation when series moved apart
R-Squared
85.5%
Share of variance in one series explained by the other.
Trend Agreement
61.9%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,254
Deep shared window — 1,254 usable pairs.
Significance
p < 0.001
95% CI: [0.916, 0.932]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired data points survived the daily window.
Raw input
1,254
1,254
Normalized
1,254
1,254
Prepared
1,254
1,254
Aligned
1,254
1,254
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
0
A: 0 / B: 0
Series A
Costco Wholesale Corp
COST
Market cap 451.9B
Stock · 1,254 raw → 1,254 prepared
Series B
Williams-Sonoma, Inc.
WSM
Market cap 21.7B · 19,800 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
7
Estimated crossover points between normalized spreads.
Slope
0.2212
Linear regression slope.
Intercept
-35.3573
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-cost-vs-stock-wsm-daily