Correlation Analysis
Costco Wholesale Corp vs Tenet Healthcare Corporation New
COST vs THC
+0.896
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
Tenet Healthcare Corporation New
↗THC
Tenet Healthcare is a Dallas-based healthcare services organization. It operates acute and specialty hospitals (50 as of December 2025) and hundreds of ambulatory surgery centers and other outpatient facilities across the US, primarily in the South. Through its Conifer segment, Tenet also provides revenue cycle management solutions.
Market cap 16.5B · 99,000 employees
Time Series
Relative Performance
Who Moves First
in sync
COST and THC tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.896 (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
+0.592
17 periods · Return correlation when both series rose
Both Falling
-0.715
5 periods · Return correlation when both series fell
Diverging
-0.541
13 periods · Return correlation when series moved apart
R-Squared
80.2%
Share of variance in one series explained by the other.
Trend Agreement
62.2%
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: [0.884, 0.906]
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
Tenet Healthcare Corporation New
THC
Market cap 16.5B · 99,000 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
0.2160
Linear regression slope.
Intercept
-41.3689
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
THC
Tenet Healthcare Corporation New
Highest
+0.964
Nvidia Corp
NVDA · 1,254 data points
Lowest
+0.454
Johnson & Johnson
JNJ · 1,254 data points
Saved 5 hours ago · ID: stock-cost-vs-stock-thc-daily