Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Rocket Lab Corporation Common Stock
BRK.B vs RKLB
+0.661
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
Rocket Lab Corporation Common Stock
↗RKLB
Rocket Lab Corp is engaged in space, building rockets, and spacecraft. It provides end-to-end mission services that provide frequent and reliable access to space for civil, defense, and commercial markets. It designs and manufactures the Electron and Neutron launch vehicles and Photon satellite platform. Rocket Lab's Electron launch vehicle has delivered multiple satellites to orbit for private and public sector organizations, enabling operations in national security, scientific research, space debris mitigation, Earth observation, climate monitoring, and communications. The business operates in two segments Launch Services and Space Systems. Geographically it serves Japan, and rest of the world and earns key revenue from the United States.
Market cap 38.5B · 2,600 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads RKLB by 6 days
BRK.B tends to move before RKLB.
After testing 13 timing shifts, the strongest relationship was +0.671 (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
-0.370
13 periods · Return correlation when both series rose
Both Falling
+0.421
6 periods · Return correlation when both series fell
Diverging
-0.876
16 periods · Return correlation when series moved apart
R-Squared
43.7%
Share of variance in one series explained by the other.
Trend Agreement
56.9%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,158
Deep shared window — 1,158 usable pairs.
Significance
p < 0.001
95% CI: [0.627, 0.692]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,158 paired data points survived the daily window.
Raw input
1,254
1,158
Normalized
1,254
1,158
Prepared
1,254
1,158
Aligned
1,158
1,158
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
96
A: 96 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Rocket Lab Corporation Common Stock
RKLB
Market cap 38.5B · 2,600 employees
Stock · 1,158 raw → 1,158 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
0.1657
Linear regression slope.
Intercept
-46.5536
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
RKLB
Rocket Lab Corporation Common Stock
Highest
+0.907
Alphabet Inc. Class C Capital Stock
GOOG · 1,158 data points
Lowest
+0.451
Exxon Mobil Corporation
XOM · 1,158 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-rklb-daily