Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Regeneron Pharmaceuticals Inc
BRK.B vs REGN
+0.211
Light 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
Regeneron Pharmaceuticals Inc
↗REGN
Regeneron Pharmaceuticals discovers, develops, and commercializes products that fight eye disease, cardiovascular disease, cancer, and inflammation. The company has several marketed products, including low-dose Eylea and Eylea HD, approved for wet age-related macular degeneration and other eye diseases; Dupixent in immunology; Praluent for LDL cholesterol lowering; Libtayo in oncology; and Kevzara in rheumatoid arthritis. Regeneron is also developing monoclonal and bispecific antibodies with Sanofi, other collaborators, and independently, and has early-stage partnerships that bring new technology to the pipeline, including RNAi (Alnylam) and Crispr-based gene editing (Intellia).
Market cap 80.7B · 15,410 employees
Time Series
Relative Performance
Who Moves First
REGN leads BRK.B by 6 days
REGN tends to move before BRK.B.
After testing 13 timing shifts, the strongest relationship was +0.219 (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
+0.505
15 periods · Return correlation when both series rose
Both Falling
-0.933
7 periods · Return correlation when both series fell
Diverging
-0.635
13 periods · Return correlation when series moved apart
R-Squared
4.4%
Share of variance in one series explained by the other.
Trend Agreement
63.4%
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: [0.157, 0.263]
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
Regeneron Pharmaceuticals Inc
REGN
Market cap 80.7B · 15,410 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
20
Estimated crossover points between normalized spreads.
Slope
0.3892
Linear regression slope.
Intercept
586.1044
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
REGN
Regeneron Pharmaceuticals Inc
Highest
+0.487
Exxon Mobil Corporation
XOM · 1,254 data points
Lowest
-0.331
Tesla, Inc. Common Stock
TSLA · 1,254 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-regn-daily