Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Moderna, Inc. Common Stock
BRK.B vs MRNA
-0.782
Strong 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
Moderna, Inc. Common Stock
↗MRNA
Moderna is a commercial-stage biotech that was founded in 2010 and had its initial public offering in December 2018. The firm's mRNA technology was rapidly validated with its covid vaccine, which was authorized in the United States in December 2020. Moderna had 35 mRNA development candidates in clinical studies as of August 2025. Programs span a wide range of therapeutic areas, including infectious disease, oncology, cardiovascular disease, and rare genetic diseases.
Market cap 19.3B · 4,700 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads MRNA by 6 days
BRK.B tends to move before MRNA.
After testing 13 timing shifts, the strongest relationship was -0.786 (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
+0.201
9 periods · Return correlation when both series rose
Both Falling
+0.371
6 periods · Return correlation when both series fell
Diverging
-0.408
20 periods · Return correlation when series moved apart
R-Squared
61.2%
Share of variance in one series explained by the other.
Trend Agreement
57.4%
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: [-0.803, -0.760]
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
Moderna, Inc. Common Stock
MRNA
Market cap 19.3B · 4,700 employees
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
-0.8374
Linear regression slope.
Intercept
442.4588
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 4 hours ago · ID: stock-brk-b-vs-stock-mrna-daily