Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Paccar Inc
BRK.B vs PCAR
+0.856
Very 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
Paccar Inc
↗PCAR
Paccar is a leading manufacturer of medium- and heavy-duty trucks under the premium nameplates Kenworth and Peterbilt, which are primarily sold in the Americas and Australia, and DAF, which primarily services Europe and South America. The trucks segment (74% sales) goes to market through a network of 2,200 independent dealers. Paccar maintains an internal finance subsidiary that provides retail and wholesale financing for customers and dealers (6% sales). In recent years, Paccar has aggressively expanded its parts business (20% of sales), including engines, axles, and transmissions for its own truck brands as well as independent producers. The company commands 30% of the Class 8 market share in North America and 15% of the heavy-duty market share in Europe.
Market cap 62.2B · 25,900 employees
Time Series
Relative Performance
Who Moves First
in sync
BRK.B and PCAR tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.856 (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
+0.191
15 periods · Return correlation when both series rose
Both Falling
-0.126
7 periods · Return correlation when both series fell
Diverging
-0.452
13 periods · Return correlation when series moved apart
R-Squared
73.3%
Share of variance in one series explained by the other.
Trend Agreement
67.5%
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: [0.841, 0.870]
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
Paccar Inc
PCAR
Market cap 62.2B · 25,900 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
17
Estimated crossover points between normalized spreads.
Slope
0.2223
Linear regression slope.
Intercept
-0.2151
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 6 hours ago · ID: stock-brk-b-vs-stock-pcar-daily