Correlation Analysis
BERKSHIRE HATHAWAY Class B vs DuPont de Nemours, Inc. Common Stock
BRK.B vs DD
+0.502
Moderate 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
DuPont de Nemours, Inc. Common Stock
↗DD
DuPont is a diversified global specialty chemicals company created in 2019 as a result of the DowDuPont merger and subsequent separations. Its portfolio includes specialty chemicals and downstream products that serve the healthcare, water, construction, automotive, aerospace, and printing and packaging industries. Healthcare and water will generate the majority of profits.
Market cap 18.6B · 15,000 employees
Time Series
Relative Performance
Who Moves First
in sync
BRK.B and DD tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.502 (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
-0.181
15 periods · Return correlation when both series rose
Both Falling
-0.080
8 periods · Return correlation when both series fell
Diverging
-0.576
12 periods · Return correlation when series moved apart
R-Squared
25.2%
Share of variance in one series explained by the other.
Trend Agreement
68.5%
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: [0.459, 0.542]
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
DuPont de Nemours, Inc. Common Stock
DD
Market cap 18.6B · 15,000 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
0.0289
Linear regression slope.
Intercept
20.7361
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
DD
DuPont de Nemours, Inc. Common Stock
Highest
+0.835
Micron Technology, Inc.
MU · 1,254 data points
Lowest
+0.409
Exxon Mobil Corporation
XOM · 1,254 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-dd-daily