Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Rivian Automotive, Inc. Class A Common Stock
BRK.B vs RIVN
-0.505
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
Rivian Automotive, Inc. Class A Common Stock
↗RIVN
Rivian is a battery electric vehicle automaker that sells its vehicles in the US and Canada. The company also develops electronic control units and related software for autos in a joint venture with Volkswagen. Rivian has multiple vehicles in its fleet, which include a luxury truck and full-size SUV and a delivery van. The company plans to begin selling a midsize SUV in 2026. Total deliveries were over 42,000 in 2025. Rivian is also developing autonomous driving software to be used in its vehicles.
Market cap 19B · 15,232 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads RIVN by 6 days
BRK.B tends to move before RIVN.
After testing 13 timing shifts, the strongest relationship was -0.517 (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
+0.366
10 periods · Return correlation when both series rose
Both Falling
+0.605
8 periods · Return correlation when both series fell
Diverging
-0.373
17 periods · Return correlation when series moved apart
R-Squared
25.5%
Share of variance in one series explained by the other.
Trend Agreement
58.7%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,104
Deep shared window — 1,104 usable pairs.
Significance
p < 0.001
95% CI: [-0.548, -0.460]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,104 paired data points survived the daily window.
Raw input
1,254
1,104
Normalized
1,254
1,104
Prepared
1,254
1,104
Aligned
1,104
1,104
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
150
A: 150 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Rivian Automotive, Inc. Class A Common Stock
RIVN
Market cap 19B · 15,232 employees
Stock · 1,104 raw → 1,104 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
-0.1330
Linear regression slope.
Intercept
75.9430
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
RIVN
Rivian Automotive, Inc. Class A Common Stock
Highest
+0.170
Tesla, Inc. Common Stock
TSLA · 1,104 data points
Lowest
-0.728
Exxon Mobil Corporation
XOM · 1,104 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-rivn-daily