Correlation Analysis
Costco Wholesale Corp vs Fox Corporation Class B Common Stock
COST vs FOX
+0.727
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
Fox Corporation Class B Common Stock
↗FOX
Fox operates in two segments: cable networks and television. Cable networks primarily includes Fox News, Fox Business, and several pay TV sports stations. Television primarily includes the Fox broadcast network, 29 owned and operated local television stations, of which 18 are affiliated with the Fox network, and streaming platform Tubi, which is not subscription-based and is completely ad-supported. Fox effectively sold most of its entertainment assets to Disney in 2019, so it no longer creates entertainment content and relies heavily on live news and sports, with nearly all tied to the pay TV bundle. The Murdoch family controls Fox.
Market cap 22.8B · 10,400 employees
Time Series
Relative Performance
Who Moves First
COST leads FOX by 6 days
COST tends to move before FOX.
After testing 13 timing shifts, the strongest relationship was +0.733 (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
+0.240
13 periods · Return correlation when both series rose
Both Falling
+0.628
6 periods · Return correlation when both series fell
Diverging
-0.894
16 periods · Return correlation when series moved apart
R-Squared
52.8%
Share of variance in one series explained by the other.
Trend Agreement
56.7%
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: [0.700, 0.752]
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
Fox Corporation Class B Common Stock
FOX
Market cap 22.8B · 10,400 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
0.0342
Linear regression slope.
Intercept
14.7689
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
FOX
Fox Corporation Class B Common Stock
Highest
+0.898
JPMorgan Chase & Co.
JPM · 1,254 data points
Lowest
+0.338
Exxon Mobil Corporation
XOM · 1,254 data points
Saved 7 hours ago · ID: stock-cost-vs-stock-fox-daily