Correlation Analysis
Microsoft Corp vs eBay Inc
MSFT vs EBAY
+0.609
Moderate positive
When one moves up, the other tends to follow.
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
eBay Inc
↗EBAY
EBay operates one of the largest e-commerce marketplaces in the world, with $79.6 billion in 2025 gross merchandise volume, rendering the firm a top 10 global e-commerce company. It generates sales from listing fees, advertising, revenue-sharing arrangements with service providers, and managed payments, with its platform connecting about 135 million buyers and roughly 20 million sellers across almost 190 global markets at the end of 2025. EBay generates just north of 50% of its GMV in international markets, with a large presence in the UK, Germany, and Australia.
Market cap 43.8B · 12,300 employees
Who Moves First
MSFT leads EBAY by 6 days
MSFT tends to move before EBAY.
Best correlation after shifting: +0.620 (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
+0.537
15 periods · Return correlation when both series rose
Both Falling
+0.509
9 periods · Return correlation when both series fell
Diverging
-0.611
11 periods · Return correlation when series moved apart
R-Squared
37.1%
Share of variance in one series explained by the other.
Trend Agreement
65.0%
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: [0.573, 0.642]
Time Series
Rebased to 100
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
Microsoft Corp
MSFT
Market cap 2.8T
Stock · 1,254 raw → 1,254 prepared
Series B
eBay Inc
EBAY
Market cap 43.8B · 12,300 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
14
Estimated crossover points between normalized spreads.
Slope
0.1170
Linear regression slope.
Intercept
18.0099
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-msft-vs-stock-ebay-daily-20260408-x7vwaw