Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Coherent Corp.
BRK.B vs COHR
-0.248
Light 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
Coherent Corp.
↗COHR
Coherent Corp is a vertically integrated manufacturing company that develops, manufactures, and markets lasers, transceivers, and other optical and optoelectronic devices, modules, and systems, as well as engineered materials, for use in the communications, industrial, instrumentation, and electronics markets. Its reporting segments are Datacenter Communications and Industrial. Its geographic areas are North America, Europe, China, Japan, and the rest of the world.
Market cap 47.5B · 30,000 employees
Time Series
Relative Performance
Who Moves First
COHR leads BRK.B by 6 days
COHR tends to move before BRK.B.
After testing 13 timing shifts, the strongest relationship was -0.267 (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
-0.095
12 periods · Return correlation when both series rose
Both Falling
+0.703
7 periods · Return correlation when both series fell
Diverging
-0.698
16 periods · Return correlation when series moved apart
R-Squared
6.1%
Share of variance in one series explained by the other.
Trend Agreement
54.6%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,207
Deep shared window — 1,207 usable pairs.
Significance
p < 0.001
95% CI: [-0.300, -0.194]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,207 paired data points survived the daily window.
Raw input
1,254
1,207
Normalized
1,254
1,207
Prepared
1,254
1,207
Aligned
1,207
1,207
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
47
A: 47 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Coherent Corp.
COHR
Market cap 47.5B · 30,000 employees
Stock · 1,207 raw → 1,207 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
12
Estimated crossover points between normalized spreads.
Slope
-0.2718
Linear regression slope.
Intercept
229.9548
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 6 hours ago · ID: stock-brk-b-vs-stock-cohr-daily