Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Copart Inc
BRK.B vs CPRT
+0.710
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
Copart Inc
↗CPRT
Based in Dallas, Copart operates an online salvage vehicle auction with operations in 11 countries across North America, Europe, and the Middle East, facilitating over 4 million transactions annually. The company utilizes its virtual bidding platform, VB3, to connect vehicle sellers with over 750,000 registered buyers around the world. Buyers primarily consist of vehicle dismantlers, rebuilders, individuals and used vehicle retailers. About 80% of Copart's vehicle volume is supplied by auto insurance companies holding vehicles deemed a total loss. Copart also offers services such as vehicle transportation, storage, title transfer, and salvage value estimation. The company primarily operates on a consignment basis and collects fees based on the vehicle's final selling price.
Market cap 31.6B · 11,600 employees
Time Series
Relative Performance
Who Moves First
CPRT leads BRK.B by 6 days
CPRT tends to move before BRK.B.
After testing 13 timing shifts, the strongest relationship was +0.724 (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
-0.450
12 periods · Return correlation when both series rose
Both Falling
+0.374
8 periods · Return correlation when both series fell
Diverging
-0.656
15 periods · Return correlation when series moved apart
R-Squared
50.4%
Share of variance in one series explained by the other.
Trend Agreement
63.7%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,254
Deep shared window — 1,254 usable pairs.
Significance
p < 0.001
95% CI: [0.681, 0.736]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired data points survived the daily window.
Raw input
1,254
1,254
Normalized
1,254
1,254
Prepared
1,254
1,254
Aligned
1,254
1,254
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
0
A: 0 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Copart Inc
CPRT
Market cap 31.6B · 11,600 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
0.0840
Linear regression slope.
Intercept
10.3377
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-brk-b-vs-stock-cprt-daily