Correlation Analysis
Oracle Corp vs Western Digital Corp.
ORCL vs WDC
+0.427
Moderate positive
When one moves up, the other tends to follow.
Oracle Corp
↗ORCL
Oracle provides enterprise applications and infrastructure offerings through a variety of flexible IT deployment models, including on-premises, cloud-based, and hybrid. Founded in 1977, Oracle pioneered the first commercial SQL-based relational database management system, which is commonly used by the world's largest companies for high-volume online transaction processing workloads. Besides databases, Oracle also sells enterprise resource planning platforms and cloud infrastructure that play an increasingly important role in large language model training and inferencing.
Market cap 418.6B
Western Digital Corp.
↗WDC
Western Digital is a leading vertically integrated supplier of hard disk drives. The HDD market is a practical duopoly, with Western Digital and Seagate being the two largest players. Western Digital designs and manufactures its HDDs, with much of the manufacturing and workforce located in Asia. The primary consumers of HDDs are data centers.
Market cap 103.1B · 40,000 employees
Time Series
Relative Performance
Who Moves First
ORCL leads WDC by 6 days
ORCL tends to move before WDC.
After testing 13 timing shifts, the strongest relationship was +0.457 (they moved in the same direction).
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
+0.715
12 periods · Return correlation when both series rose
Both Falling
+0.773
5 periods · Return correlation when both series fell
Diverging
-0.751
18 periods · Return correlation when series moved apart
R-Squared
18.2%
Share of variance in one series explained by the other.
Trend Agreement
63.3%
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: [0.380, 0.471]
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
Oracle Corp
ORCL
Market cap 418.6B
Stock · 1,254 raw → 1,254 prepared
Series B
Western Digital Corp.
WDC
Market cap 103.1B · 40,000 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
0.4151
Linear regression slope.
Intercept
18.3795
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 4 hours ago · ID: stock-orcl-vs-stock-wdc-daily