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Correlation Analysis

Apple Inc. vs Comcast Corp

AAPL vs CMCSA

-0.609

Moderate inverse

When one moves up, the other tends to move down.

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

CMCSA logo

Comcast Corp

CMCSA

Comcast is made up of three parts. The core cable business owns networks capable of providing television, internet access, and phone services to 65 million US homes and businesses, or nearly half of the country. The firm provides services to about 47% of the locations in this territory. Comcast acquired NBCUniversal from General Electric in 2011. Following the spinoff of several cable networks, including CNBC, MSNBC, and USA, NBCU now consists of the NBC network, several local NBC affiliates, Bravo, the Peacock streaming platform, Universal Studios, and several theme parks. Finally, Sky, acquired in 2018, is a large television provider in the UK and Italy.

Market cap 99.5B · 179,000 employees

Apr 9, 2021 — Apr 7, 2026Daily1,254 data pointsStockStockTechnologyCommunication

Time Series

Relative Performance

Green: AAPLGray: CMCSA36 of 1,254 points (sampled)

Who Moves First

AAPL leads CMCSA by 6 days

AAPL tends to move before CMCSA.

After testing 13 timing shifts, the strongest relationship was -0.610 (they moved in opposite directions).

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

+0.309

12 periods · Return correlation when both series rose

Both Falling

-0.229

11 periods · Return correlation when both series fell

Diverging

-0.815

12 periods · Return correlation when series moved apart

R-Squared

37.1%

Share of variance in one series explained by the other.

Trend Agreement

60.8%

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: [-0.643, -0.573]

Scatter

XY Regression

112.3120140160180200220240260280285.624.76253035404550556061.86Apple Inc.Comcast CorpData pointsFit (r = -0.609)

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

AAPL logo

Apple Inc.

AAPL

Market cap 3.8T

Stock · 1,254 raw → 1,254 prepared

Series B

CMCSA logo

Comcast Corp

CMCSA

Market cap 99.5B · 179,000 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

15

Estimated crossover points between normalized spreads.

Slope

-0.1195

Linear regression slope.

Intercept

63.3929

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 5 hours ago · ID: stock-aapl-vs-stock-cmcsa-daily-20260408-nklzs6