Correlation Analysis
AutoZone, Inc. vs Costco Wholesale Corp
AZO vs COST
+0.917
Very strong positive
When one moves up, the other tends to follow.
AutoZone, Inc.
↗AZO
AutoZone operates as a leading retailer of aftermarket automotive parts in the United States. The firm operates 6,666 stores domestically, serving the do-it-yourself and commercial (do-it-for-me) end markets. Through its vast store footprint and distribution network, AutoZone manages a wide array of stock-keeping units applicable to numerous vehicle makes and models, providing its consumers with ample product availability. The firm drives traffic by providing superior and convenient customer service as AutoZone's team of knowledgeable staff assists consumers with diagnosing a vehicle's problem, selecting the necessary part for replacement, and occasionally, installation. The company also operates internationally, with 895 stores in Mexico and 149 in Brazil.
Market cap 56.7B · 130,000 employees
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
Time Series
Relative Performance
Who Moves First
COST leads AZO by 6 days
COST tends to move before AZO.
After testing 13 timing shifts, the strongest relationship was +0.917 (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
+0.165
17 periods · Return correlation when both series rose
Both Falling
-0.040
9 periods · Return correlation when both series fell
Diverging
-0.533
9 periods · Return correlation when series moved apart
R-Squared
84.0%
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: [0.907, 0.925]
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
AutoZone, Inc.
AZO
Market cap 56.7B · 130,000 employees
Stock · 1,254 raw → 1,254 prepared
Series B
Costco Wholesale Corp
COST
Market cap 451.9B
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
29
Estimated crossover points between normalized spreads.
Slope
0.2659
Linear regression slope.
Intercept
-39.2372
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-azo-vs-stock-cost-daily