Correlation Analysis
Costco Wholesale Corp vs Freeport-McMoran Inc.
COST vs FCX
+0.482
Moderate 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
Freeport-McMoran Inc.
↗FCX
Freeport-McMoRan owns stakes in 10 copper mines, led by its 49% ownership of the Grasberg copper and gold operations in Indonesia, 55% of the Cerro Verde mine in Peru, and 72% of Morenci in Arizona. It sold around 1.1 million metric tons of copper (its share) in 2025, making it the one of the world's largest copper miners by volume. It also sold about 530,000 ounces of gold, mostly from Grasberg, and 74 million pounds of molybdenum. It had about 25 years of copper reserves at the end of December 2025. We expect it to sell about 1.3 million metric tons of copper and 610,000 ounces of gold midcycle in 2030.
Market cap 87.7B · 29,000 employees
Time Series
Relative Performance
Who Moves First
in sync
COST and FCX tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.482 (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
+0.340
13 periods · Return correlation when both series rose
Both Falling
+0.828
6 periods · Return correlation when both series fell
Diverging
-0.791
16 periods · Return correlation when series moved apart
R-Squared
23.3%
Share of variance in one series explained by the other.
Trend Agreement
55.6%
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: [0.439, 0.524]
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
Freeport-McMoran Inc.
FCX
Market cap 87.7B · 29,000 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
0.0160
Linear regression slope.
Intercept
30.2307
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 6 hours ago · ID: stock-cost-vs-stock-fcx-daily