Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Equinix, Inc. Common Stock REIT
BRK.B vs EQIX
+0.610
Moderate 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
Equinix, Inc. Common Stock REIT
↗EQIX
Equinix is one of the leading providers of cloud- and carrier-neutral data centers, offering colocation and interconnection services to hyperscalers and businesses. Equinix operates 270 properties in 77 metropolitan areas across 36 countries, serving over 10,000 customers. About 70% of Equinix's revenue comes from renting physical space, which allows hyperscalers and other clients to store servers, data storage, and networking equipment. The other 30% of revenue is generated primarily through interconnection services (20%) and other managed services (10%).
Market cap 100.2B · 13,716 employees
Time Series
Relative Performance
Who Moves First
in sync
BRK.B and EQIX tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.610 (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
-0.553
13 periods · Return correlation when both series rose
Both Falling
+0.685
6 periods · Return correlation when both series fell
Diverging
-0.764
16 periods · Return correlation when series moved apart
R-Squared
37.3%
Share of variance in one series explained by the other.
Trend Agreement
61.0%
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: [0.575, 0.644]
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
Equinix, Inc. Common Stock REIT
EQIX
Market cap 100.2B · 13,716 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
66
Estimated crossover points between normalized spreads.
Slope
0.6419
Linear regression slope.
Intercept
536.1412
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
EQIX
Equinix, Inc. Common Stock REIT
Highest
+0.649
NetFlix Inc
NFLX · 1,254 data points
Lowest
+0.111
Johnson & Johnson
JNJ · 1,254 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-eqix-daily