Correlation Analysis
Amazon.Com Inc vs W.R. Berkley Corporation
AMZN vs WRB
+0.681
Strong positive
When one moves up, the other tends to follow.
Amazon.Com Inc
↗AMZN
Amazon is the leading online retailer and marketplace for third party sellers. Retail related revenue represents approximately 74% of total, followed by Amazon Web Services (17%), and advertising services (9%). International segments constitute 22% of Amazon's total revenue, led by Germany, the United Kingdom, and Japan.
Market cap 2.3T
W.R. Berkley Corporation
↗WRB
W.R. Berkley is an insurance holding company with a host of subsidiaries that primarily underwrite commercial casualty insurance. The firm specializes in niche products that include various excess and surplus lines, workers' compensation insurance, self-insurance consulting, reinsurance, and regional commercial lines for small and midsize businesses.
Market cap 24.8B · 8,804 employees
Time Series
Rebased to 100
Who Moves First
WRB leads AMZN by 6 days
WRB tends to move before AMZN.
Best correlation after shifting: +0.682 (13 shifts scanned)
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
+0.034
12 periods · Return correlation when both series rose
Both Falling
-0.740
5 periods · Return correlation when both series fell
Diverging
-0.783
18 periods · Return correlation when series moved apart
R-Squared
46.4%
Share of variance in one series explained by the other.
Trend Agreement
48.9%
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: [0.650, 0.710]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired observations 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
Amazon.Com Inc
AMZN
Market cap 2.3T
Stock · 1,254 raw → 1,254 prepared
Series B
W.R. Berkley Corporation
WRB
Market cap 24.8B · 8,804 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
32
Estimated crossover points between normalized spreads.
Slope
0.2080
Linear regression slope.
Intercept
16.5125
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-amzn-vs-stock-wrb-daily-20260408-80lbba