Correlation Analysis
Amazon.Com Inc vs DexCom, Inc.
AMZN vs DXCM
-0.411
Moderate inverse
When one moves up, the other tends to move down.
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
DexCom, Inc.
↗DXCM
DexCom designs and commercializes continuous glucose monitoring systems for diabetic patients. CGM systems serve as an alternative to the traditional blood glucose meter process, and the company is evolving its CGM systems to provide integration with insulin pumps from Insulet and Tandem for automatic insulin delivery. DexCom's CGMs are available through medical equipment distributors as well as retail pharmacies.
Market cap 24.3B · 11,100 employees
Time Series
Relative Performance
Who Moves First
AMZN leads DXCM by 6 days
AMZN tends to move before DXCM.
After testing 13 timing shifts, the strongest relationship was -0.422 (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
+0.073
14 periods · Return correlation when both series rose
Both Falling
+0.379
10 periods · Return correlation when both series fell
Diverging
-0.712
11 periods · Return correlation when series moved apart
R-Squared
16.9%
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: [-0.456, -0.364]
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
Amazon.Com Inc
AMZN
Market cap 2.3T
Stock · 1,254 raw → 1,254 prepared
Series B
DexCom, Inc.
DXCM
Market cap 24.3B · 11,100 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
18
Estimated crossover points between normalized spreads.
Slope
-0.2366
Linear regression slope.
Intercept
138.8497
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 5 hours ago · ID: stock-amzn-vs-stock-dxcm-daily-20260408-dnac68