Correlation Analysis
BERKSHIRE HATHAWAY Class B vs EXAS
BRK.B vs EXAS
-0.208
Light inverse
When one moves up, the other tends to move down.
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
EXAS
EXAS
Time Series
Relative Performance
Who Moves First
EXAS leads BRK.B by 6 days
EXAS tends to move before BRK.B.
After testing 13 timing shifts, the strongest relationship was -0.223 (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
+0.023
11 periods · Return correlation when both series rose
Both Falling
+0.363
9 periods · Return correlation when both series fell
Diverging
-0.513
15 periods · Return correlation when series moved apart
R-Squared
4.3%
Share of variance in one series explained by the other.
Trend Agreement
56.2%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,243
Deep shared window — 1,243 usable pairs.
Significance
p < 0.001
95% CI: [-0.260, -0.154]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,243 paired data points survived the daily window.
Raw input
1,254
1,243
Normalized
1,254
1,243
Prepared
1,254
1,243
Aligned
1,243
1,243
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
11
A: 11 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
EXAS
Stock · 1,243 raw → 1,243 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
-0.0561
Linear regression slope.
Intercept
90.1359
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-brk-b-vs-stock-exas-daily