Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Philip Morris International Inc.
BRK.B vs PM
+0.840
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
Philip Morris International Inc.
↗PM
Created from the international operations of Altria in 2008, Philip Morris International sells cigarettes and reduced-risk products, including heat sticks, vapes, and oral nicotine offerings, primarily outside of the US. With the 2023 acquisition of Swedish Match, a leading manufacturer of traditional oral tobacco products and nicotine pouches primarily in the US and Scandinavia, PMI is not only dominant in smokable products but also has the Iqos and Zyn brands, which respectively dominate heated tobacco and nicotine pouches in most markets. It also owns the Veev brand in vapes.
Market cap 249.9B
Time Series
Relative Performance
Who Moves First
BRK.B leads PM by 6 days
BRK.B tends to move before PM.
After testing 13 timing shifts, the strongest relationship was +0.846 (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
-0.187
14 periods · Return correlation when both series rose
Both Falling
+0.321
6 periods · Return correlation when both series fell
Diverging
-0.662
15 periods · Return correlation when series moved apart
R-Squared
70.6%
Share of variance in one series explained by the other.
Trend Agreement
61.1%
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: [0.823, 0.856]
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
Philip Morris International Inc.
PM
Market cap 249.9B
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
13
Estimated crossover points between normalized spreads.
Slope
0.2930
Linear regression slope.
Intercept
4.3837
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
PM
Philip Morris International Inc.
Highest
+0.923
Walmart Inc. Common Stock
WMT · 1,254 data points
Lowest
+0.461
Johnson & Johnson
JNJ · 1,254 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-pm-daily