Correlation Analysis
BERKSHIRE HATHAWAY Class B vs First Citizens BancShares Inc
BRK.B vs FCNCA
+0.924
Very strong 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
First Citizens BancShares Inc
↗FCNCA
First Citizens BancShares Inc. is a Raleigh, N.C.-based financial holding company operating through its subsidiary, First-Citizens Bank & Trust Company. It provides comprehensive retail banking, commercial lending, leasing, and wealth management services via a nationwide branch network and digital platforms. In 2023 acquisition of Silicon Valley Bank, it also specializes in banking for tech, healthcare, and innovation firms.
Market cap 22.8B · 18,141 employees
Time Series
Relative Performance
Who Moves First
FCNCA leads BRK.B by 6 days
FCNCA tends to move before BRK.B.
After testing 13 timing shifts, the strongest relationship was +0.925 (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
-0.301
13 periods · Return correlation when both series rose
Both Falling
N/A
3 periods · Return correlation when both series fell
Diverging
-0.577
19 periods · Return correlation when series moved apart
R-Squared
85.3%
Share of variance in one series explained by the other.
Trend Agreement
66.2%
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: [0.915, 0.931]
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
First Citizens BancShares Inc
FCNCA
Market cap 22.8B · 18,141 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
5.8071
Linear regression slope.
Intercept
-844.9852
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
FCNCA
First Citizens BancShares Inc
Highest
+0.936
Eli Lilly & Co.
LLY · 1,254 data points
Lowest
+0.092
Johnson & Johnson
JNJ · 1,254 data points
Saved 6 hours ago · ID: stock-brk-b-vs-stock-fcnca-daily