Correlation Analysis
Amazon.Com Inc vs Sandisk Corporation Common Stock
AMZN vs SNDK
+0.164
Weak 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
Sandisk Corporation Common Stock
↗SNDK
Sandisk is one of the five largest suppliers of NAND flash memory semiconductors globally. Sandisk is vertically integrated, producing substantially all of its flash chips at manufacturing sites across Japan via a joint-venture framework with Kioxia. Sandisk then repackages most of its chips into SSDs for consumer electronics, external storage, or cloud storage. Sandisk was formerly a piece of Western Digital for nine years (after being acquired in 2016) and was spun off as an independent company in 2025.
Market cap 107B · 11,000 employees
Time Series
Rebased to 100
Who Moves First
AMZN leads SNDK by 6 days
AMZN tends to move before SNDK.
Best correlation after shifting: +0.234 (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
-0.216
11 periods · Return correlation when both series rose
Both Falling
-0.345
7 periods · Return correlation when both series fell
Diverging
-0.718
17 periods · Return correlation when series moved apart
R-Squared
2.7%
Share of variance in one series explained by the other.
Trend Agreement
58.6%
How often both series moved in the same direction period-to-period.
Overlap Quality
281
Robust shared window — 281 usable pairs.
Significance
p < 0.01
95% CI: [0.048, 0.276]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
281 paired observations survived the daily window.
Raw input
1,254
281
Normalized
1,254
281
Prepared
1,254
281
Aligned
281
281
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
973
A: 973 / B: 0
Series A
Amazon.Com Inc
AMZN
Market cap 2.3T
Stock · 1,254 raw → 1,254 prepared
Series B
Sandisk Corporation Common Stock
SNDK
Market cap 107B · 11,000 employees
Stock · 281 raw → 281 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
9
Estimated crossover points between normalized spreads.
Slope
2.1229
Linear regression slope.
Intercept
-255.3581
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-amzn-vs-stock-sndk-daily-20260408-e1eo9x