Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Hologic Inc
BRK.B vs HOLX
-0.182
Weak 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
Hologic Inc
↗HOLX
Hologic manufactures proprietary products for the healthcare needs of women. The company operates in four segments: diagnostics (44% of total sales), breast health (38%), surgical (16%), and skeletal health (2%). While the company traditionally focused on breast health, the acquisition of Gen-Probe put greater emphasis on commercial diagnostics. The United States accounts for the largest portion of the firm's revenue (69%), followed by Europe (20%), Asia (8%), and other international markets (3%). Hologic is headquartered in Bedford, Massachusetts.
Market cap 17B · 7,070 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads HOLX by 6 days
BRK.B tends to move before HOLX.
After testing 13 timing shifts, the strongest relationship was -0.190 (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
-0.303
12 periods · Return correlation when both series rose
Both Falling
+0.368
8 periods · Return correlation when both series fell
Diverging
-0.682
15 periods · Return correlation when series moved apart
R-Squared
3.3%
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
1,253
Deep shared window — 1,253 usable pairs.
Significance
p < 0.001
95% CI: [-0.235, -0.128]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,253 paired data points survived the daily window.
Raw input
1,254
1,253
Normalized
1,254
1,253
Prepared
1,254
1,253
Aligned
1,253
1,253
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1
A: 1 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Hologic Inc
HOLX
Market cap 17B · 7,070 employees
Stock · 1,253 raw → 1,253 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
-0.0132
Linear regression slope.
Intercept
77.9076
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 7 hours ago · ID: stock-brk-b-vs-stock-holx-daily