Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Fox Corporation Class B Common Stock
BRK.B vs FOX
+0.750
Strong positive
When one moves up, the other tends to follow.
BERKSHIRE HATHAWAY Class B
↗BRK.B
Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from its operations to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the companies that make up its manufacturing, service, and retailing operations (which include Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis. Berkshire is expected to generate close to $375 billion in revenue in 2025.
Market cap 1T
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
BRK.B leads FOX by 6 days
BRK.B tends to move before FOX.
After testing 13 timing shifts, the strongest relationship was +0.753 (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
-0.054
13 periods · Return correlation when both series rose
Both Falling
+0.511
7 periods · Return correlation when both series fell
Diverging
-0.414
15 periods · Return correlation when series moved apart
R-Squared
56.2%
Share of variance in one series explained by the other.
Trend Agreement
66.2%
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: [0.724, 0.773]
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
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
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
1
Estimated crossover points between normalized spreads.
Slope
0.0895
Linear regression slope.
Intercept
4.1063
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
BRK.B
BERKSHIRE HATHAWAY Class B
Highest
+0.968
Republic Services Inc.
RSG · 1,254 data points
Lowest
-0.918
United Parcel Service, Inc. Class B
UPS · 1,254 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 6 hours ago · ID: stock-brk-b-vs-stock-fox-daily