Correlation Analysis
Amazon.Com Inc vs HCA Healthcare, Inc.
AMZN vs HCA
+0.738
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
HCA Healthcare, Inc.
↗HCA
HCA Healthcare is a Nashville-based healthcare provider organization operating the largest collection of acute-care hospitals in the United States. As of December 2025, the firm owned and operated 190 hospitals and over 2,500 outpatient facillities across 19 states and a small foothold in the United Kingdom.
Market cap 108.2B · 320,000 employees
Time Series
Rebased to 100
Who Moves First
HCA leads AMZN by 5 days
HCA tends to move before AMZN.
Best correlation after shifting: +0.738 (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
+0.731
15 periods · Return correlation when both series rose
Both Falling
+0.251
6 periods · Return correlation when both series fell
Diverging
-0.625
14 periods · Return correlation when series moved apart
R-Squared
54.4%
Share of variance in one series explained by the other.
Trend Agreement
56.5%
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: [0.711, 0.762]
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
HCA Healthcare, Inc.
HCA
Market cap 108.2B · 320,000 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
35
Estimated crossover points between normalized spreads.
Slope
1.4744
Linear regression slope.
Intercept
56.2082
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-amzn-vs-stock-hca-daily-20260408-0ma1s5