Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Block, Inc.
BRK.B vs XYZ
-0.586
Moderate 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
Block, Inc.
↗XYZ
Founded in 2009, Block provides payment services to merchants, along with related services. The company also launched Cash App, a person-to-person payment network. In 2024, Square's payment volume was almost USD 250 million.
Market cap 36.4B · 10,205 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads XYZ by 5 days
BRK.B tends to move before XYZ.
After testing 13 timing shifts, the strongest relationship was -0.635 (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
-0.224
11 periods · Return correlation when both series rose
Both Falling
+0.379
12 periods · Return correlation when both series fell
Diverging
-0.814
12 periods · Return correlation when series moved apart
R-Squared
34.4%
Share of variance in one series explained by the other.
Trend Agreement
55.0%
How often both series moved in the same direction period-to-period.
Overlap Quality
304
Robust shared window — 304 usable pairs.
Significance
p < 0.001
95% CI: [-0.655, -0.507]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
304 paired data points survived the daily window.
Raw input
1,254
304
Normalized
1,254
304
Prepared
1,254
304
Aligned
304
304
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
950
A: 950 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Block, Inc.
XYZ
Market cap 36.4B · 10,205 employees
Stock · 304 raw → 304 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
20
Estimated crossover points between normalized spreads.
Slope
-0.3528
Linear regression slope.
Intercept
241.2629
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 6 hours ago · ID: stock-brk-b-vs-stock-xyz-daily