Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Marsh
BRK.B vs MRSH
+0.270
Light 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
Marsh
↗MRSH
Marsh McLennan is a professional services firm that provides advice and solutions in the areas of risk, strategy, and human capital. The company operates through two main segments: risk and insurance services and consulting. In risk and insurance services, the firm offers services via Marsh (an insurance broker) and Guy Carpenter (a risk and reinsurance specialist). The consulting division comprises Mercer (a provider of human resource services) and Oliver Wyman (a management and economic consultancy). About half of its revenue is generated outside the US.
Market cap 84.5B · 55,700 employees
Time Series
Relative Performance
Who Moves First
MRSH leads BRK.B by 6 days
MRSH tends to move before BRK.B.
After testing 13 timing shifts, the strongest relationship was +0.514 (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
-0.297
10 periods · Return correlation when both series rose
Both Falling
+0.166
14 periods · Return correlation when both series fell
Diverging
-0.814
11 periods · Return correlation when series moved apart
R-Squared
7.3%
Share of variance in one series explained by the other.
Trend Agreement
69.6%
How often both series moved in the same direction period-to-period.
Overlap Quality
57
Thin shared window — 57 usable pairs.
Significance
p < 0.05
95% CI: [0.010, 0.496]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
57 paired data points survived the daily window.
Raw input
1,254
57
Normalized
1,254
57
Prepared
1,254
57
Aligned
57
57
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,197
A: 1197 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Marsh
MRSH
Market cap 84.5B · 55,700 employees
Stock · 57 raw → 57 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
6
Estimated crossover points between normalized spreads.
Slope
0.1546
Linear regression slope.
Intercept
103.0054
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-brk-b-vs-stock-mrsh-daily