Correlation Analysis
Microsoft Corp vs Sandisk Corporation Common Stock
MSFT vs SNDK
-0.382
Light inverse
When one moves up, the other tends to move down.
Microsoft Corp
↗MSFT
Microsoft develops and licenses consumer and enterprise software. It is known for its Windows operating systems and Office productivity suite. The company is organized into three equally sized broad segments: productivity and business processes (legacy Microsoft Office, cloud-based Office 365, Exchange, SharePoint, Skype, LinkedIn, Dynamics), intelligence cloud (infrastructure- and platform-as-a-service offerings Azure, Windows Server OS, SQL Server), and more personal computing (Windows Client, Xbox, Bing search, display advertising, and Surface laptops, tablets, and desktops).
Market cap 2.8T
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
SNDK leads MSFT by 6 days
SNDK tends to move before MSFT.
Best correlation after shifting: -0.443 (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
-0.072
10 periods · Return correlation when both series rose
Both Falling
N/A
4 periods · Return correlation when both series fell
Diverging
-0.656
21 periods · Return correlation when series moved apart
R-Squared
14.6%
Share of variance in one series explained by the other.
Trend Agreement
58.9%
How often both series moved in the same direction period-to-period.
Overlap Quality
281
Robust shared window — 281 usable pairs.
Significance
p < 0.001
95% CI: [-0.478, -0.278]
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
Microsoft Corp
MSFT
Market cap 2.8T
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
-1.5793
Linear regression slope.
Intercept
928.5822
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-msft-vs-stock-sndk-daily-20260408-sfu0i4