Correlation Analysis
Apple Inc. vs Equifax, Incorporated
AAPL vs EFX
+0.227
Light positive
When one moves up, the other tends to follow.
Apple Inc.
↗AAPL
Apple is among the largest companies in the world, with a broad portfolio of hardware and software products targeted at consumers and businesses. Apple's iPhone makes up a majority of the firm sales, and Apple's other products like Mac, iPad, and Watch are designed around the iPhone as the focal point of an expansive software ecosystem. Apple has progressively worked to add new applications, like streaming video, subscription bundles, and augmented reality. The firm designs its own software and semiconductors while working with subcontractors like Foxconn and TSMC to build its products and chips. Slightly less than half of Apple's sales come directly through its flagship stores, with a majority of sales coming indirectly through partnerships and distribution.
Market cap 3.8T
Equifax, Incorporated
↗EFX
Along with Experian and TransUnion, Equifax is one of the leading credit bureaus in the United States. Equifax's credit reports provide credit histories on millions of consumers, and the firm's services are critical to lenders' credit decisions. In addition, about 40% of the firm's revenue comes from workforce solutions, which provides income verification and employer human resources services. Equifax generates about 25% of its revenue from outside the United States.
Market cap 22B · 15,000 employees
Time Series
Relative Performance
Who Moves First
EFX leads AAPL by 6 days
EFX tends to move before AAPL.
After testing 13 timing shifts, the strongest relationship was +0.239 (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
+0.313
12 periods · Return correlation when both series rose
Both Falling
+0.179
9 periods · Return correlation when both series fell
Diverging
-0.806
14 periods · Return correlation when series moved apart
R-Squared
5.1%
Share of variance in one series explained by the other.
Trend Agreement
61.9%
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: [0.174, 0.279]
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
Apple Inc.
AAPL
Market cap 3.8T
Stock · 1,254 raw → 1,254 prepared
Series B
Equifax, Incorporated
EFX
Market cap 22B · 15,000 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
41
Estimated crossover points between normalized spreads.
Slope
0.1842
Linear regression slope.
Intercept
196.4078
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 5 hours ago · ID: stock-aapl-vs-stock-efx-daily-20260408-3b7t0v