Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Mondelez International, Inc. Class A
BRK.B vs MDLZ
-0.047
Near-zero 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
Mondelez International, Inc. Class A
↗MDLZ
Mondelez has operated independently since its split from the former Kraft Foods North American grocery business in October 2012. The firm is a leading player in the global snack enclave with a presence in the biscuit (48% of sales as of the end of fiscal 2025), chocolate (33%), gum/candy (10%), beverage (3%), and cheese and grocery (6%) aisles. Mondelez's portfolio includes well-known brands like Oreo, Chips Ahoy, Halls, and Cadbury. The firm derives around one-third of its revenue from developing markets, around 40% from Europe, and more than one-fourth from North America.
Market cap 74.9B · 91,000 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads MDLZ by 6 days
BRK.B tends to move before MDLZ.
After testing 13 timing shifts, the strongest relationship was -0.069 (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
-0.087
14 periods · Return correlation when both series rose
Both Falling
-0.270
10 periods · Return correlation when both series fell
Diverging
-0.596
11 periods · Return correlation when series moved apart
R-Squared
0.2%
Share of variance in one series explained by the other.
Trend Agreement
61.7%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,254
Deep shared window — 1,254 usable pairs.
Significance
n.s.
95% CI: [-0.102, 0.008]
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
Mondelez International, Inc. Class A
MDLZ
Market cap 74.9B · 91,000 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
-0.0030
Linear regression slope.
Intercept
66.4223
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
MDLZ
Mondelez International, Inc. Class A
Highest
+0.120
Exxon Mobil Corporation
XOM · 1,254 data points
Lowest
-0.584
Tesla, Inc. Common Stock
TSLA · 1,254 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-mdlz-daily