Correlation Analysis
Costco Wholesale Corp vs Elevance Health, Inc.
COST vs ELV
-0.583
Moderate 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
Elevance Health, Inc.
↗ELV
Elevance Health remains one of the leading health insurers in the US, providing medical benefits to 45 million medical members at the end of 2025. The company offers employer, individual, and government-sponsored coverage plans. Elevance differs from its peers in its unique position as the largest single provider of Blue Cross Blue Shield branded coverage, operating as the licensee for the Blue Cross Blue Shield Association in 14 states. Through acquisitions, such as the Amerigroup deal in 2012 and MMM in 2021, Elevance's reach expands beyond those states in government-sponsored programs, such as Medicaid and Medicare Advantage plans, too. It is also an emerging player in pharmacy benefit management and other healthcare services.
Market cap 66.5B · 97,100 employees
Time Series
Relative Performance
Who Moves First
COST leads ELV by 6 days
COST tends to move before ELV.
After testing 13 timing shifts, the strongest relationship was -0.593 (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
-0.051
14 periods · Return correlation when both series rose
Both Falling
+0.213
8 periods · Return correlation when both series fell
Diverging
-0.865
13 periods · Return correlation when series moved apart
R-Squared
34.0%
Share of variance in one series explained by the other.
Trend Agreement
54.3%
How often both series moved in the same direction period-to-period.
Overlap Quality
947
Deep shared window — 947 usable pairs.
Significance
p < 0.001
95% CI: [-0.623, -0.539]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
947 paired data points survived the daily window.
Raw input
1,254
947
Normalized
1,254
947
Prepared
1,254
947
Aligned
947
947
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
307
A: 307 / B: 0
Series A
Costco Wholesale Corp
COST
Market cap 451.9B
Stock · 1,254 raw → 1,254 prepared
Series B
Elevance Health, Inc.
ELV
Market cap 66.5B · 97,100 employees
Stock · 947 raw → 947 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
13
Estimated crossover points between normalized spreads.
Slope
-0.2101
Linear regression slope.
Intercept
597.1145
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-cost-vs-stock-elv-daily