Correlation Analysis
Costco Wholesale Corp vs LyondellBasell Industries N.V. Class A
COST vs LYB
-0.690
Strong inverse
When one moves up, the other tends to move down.
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
LyondellBasell Industries N.V. Class A
↗LYB
LyondellBasell is a petrochemical producer with operations in the United States, Europe, and Asia. The company is the world's largest producer of polypropylene and also a major producer of polyethylene and propylene oxide. Its chemicals are used in various consumer and industrial end products. Well over half of LyondellBasell's production comes from its North American operations.
Market cap 25.3B · 18,970 employees
Time Series
Relative Performance
Who Moves First
COST leads LYB by 6 days
COST tends to move before LYB.
After testing 13 timing shifts, the strongest relationship was -0.693 (they moved in opposite directions).
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
-0.218
9 periods · Return correlation when both series rose
Both Falling
+0.653
7 periods · Return correlation when both series fell
Diverging
-0.610
19 periods · Return correlation when series moved apart
R-Squared
47.6%
Share of variance in one series explained by the other.
Trend Agreement
55.4%
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: [-0.718, -0.660]
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
LyondellBasell Industries N.V. Class A
LYB
Market cap 25.3B · 18,970 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
-0.0579
Linear regression slope.
Intercept
125.1094
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
COST
Costco Wholesale Corp
Highest
+0.977
Republic Services Inc.
RSG · 1,254 data points
Lowest
-0.912
Fiserv, Inc. Common Stock
FISV · 644 data points
LYB
LyondellBasell Industries N.V. Class A
Highest
-0.412
Johnson & Johnson
JNJ · 1,254 data points
Lowest
-0.831
Broadcom Inc. Common Stock
AVGO · 1,254 data points
Saved 7 hours ago · ID: stock-cost-vs-stock-lyb-daily