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Correlation Analysis

Apple Inc. vs Medline Inc. Class A common stock

AAPL vs MDLN

+0.240

Light positive

When one moves up, the other tends to follow.

AAPL logo

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

M

Medline Inc. Class A common stock

MDLN

Medline is the largest medical-surgical products and supply chain solutions provider in the US. The company generates over 90% of its revenue domestically and serves some of the largest US health systems. Medline offers approximately 190,000 Medline-branded products across more than 250 product families—including front line care, surgical solutions, and laboratory and diagnostics—as well as roughly 150,000 third-party products sourced from over 1,250 vendors. The company maintains prime vendor relationships with many customers, acting as the primary consolidated logistics partner for their medical-surgical needs. Medline has significant scale, supported by more than 30 manufacturing facilities and a fleet of over 2,000 owned delivery trucks. Medline went public in December 2025.

Market cap 35.6B · 45,000 employees

Dec 17, 2025 — Apr 7, 2026Daily75 observationsStockStockTechnology

Time Series

Rebased to 100

Green: AAPLGray: MDLN36 of 75 points (sampled)

Who Moves First

MDLN leads AAPL by 2 days

MDLN tends to move before AAPL.

Best correlation after shifting: +0.338 (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

-0.165

9 periods · Return correlation when both series rose

Both Falling

-0.071

10 periods · Return correlation when both series fell

Diverging

-0.798

16 periods · Return correlation when series moved apart

R-Squared

5.8%

Share of variance in one series explained by the other.

Trend Agreement

54.1%

How often both series moved in the same direction period-to-period.

Overlap Quality

75

Thin shared window — 75 usable pairs.

Significance

p < 0.05

95% CI: [0.014, 0.443]

Scatter

XY Regression

244.19245250255260265270275280280.6338.1540424446485050.49Apple Inc.Medline Inc. Class A common stockData pointsFit (r = 0.24)

Pipeline

Data quality details

Pipeline Summary

75 paired observations survived the daily window.

Raw input

1,254

75

Normalized

1,254

75

Prepared

1,254

75

Aligned

75

75

Invalid removed

0

A: 0 / B: 0

Duplicates removed

0

A: 0 / B: 0

Alignment drops

1,179

A: 1179 / B: 0

Series A

AAPL logo

Apple Inc.

AAPL

Market cap 3.8T

Stock · 1,254 raw → 1,254 prepared

Series B

M

Medline Inc. Class A common stock

MDLN

Market cap 35.6B · 45,000 employees

Stock · 75 raw → 75 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

13

Estimated crossover points between normalized spreads.

Slope

0.0652

Linear regression slope.

Intercept

26.8085

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

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