Correlation Analysis
Apple Inc. vs Automatic Data Processing
AAPL vs ADP
+0.612
Moderate 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
Automatic Data Processing
↗ADP
ADP is a global technology company providing cloud-based human capital management solutions, enabling clients to better implement payroll, talent, time, tax, and benefits administration. Additionally, ADP provides human resources outsourcing solutions that permit customers to offload some of their traditional HR tasks. The company operates through two segments: employer services and professional employer organization services. Employer services consist of the company's HCM products as well as a la carte HRO solutions. PEO services contain ADP's comprehensive HRO solution, where it acts as a co-employer with its customer. As of fiscal 2025, ADP serves over 1.1 million clients and pays over 42 million workers across 140 countries.
Market cap 82.3B · 67,000 employees
Time Series
Rebased to 100
Who Moves First
ADP leads AAPL by 6 days
ADP tends to move before AAPL.
Best correlation after shifting: +0.618 (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
-0.694
10 periods · Return correlation when both series rose
Both Falling
+0.060
8 periods · Return correlation when both series fell
Diverging
-0.769
17 periods · Return correlation when series moved apart
R-Squared
37.4%
Share of variance in one series explained by the other.
Trend Agreement
63.4%
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: [0.576, 0.645]
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
Apple Inc.
AAPL
Market cap 3.8T
Stock · 1,254 raw → 1,254 prepared
Series B
Automatic Data Processing
ADP
Market cap 82.3B · 67,000 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
50
Estimated crossover points between normalized spreads.
Slope
0.5133
Linear regression slope.
Intercept
148.9556
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-aapl-vs-stock-adp-daily-20260408-op31zx