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Correlation Analysis

Apple Inc. vs Cisco Systems, Inc. Common Stock (DE)

AAPL vs CSCO

+0.725

Strong 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

CSCO logo

Cisco Systems, Inc. Common Stock (DE)

CSCO

Cisco Systems is the largest provider of networking equipment in the world and one of the largest software companies in the world. Its largest businesses are selling networking hardware and software (where it has leading market shares) and cybersecurity software such as firewalls. It also has collaboration products, like its Webex suite, and observability tools. It primarily outsources its manufacturing to third parties and has a large sales and marketing staff—25,000 strong across 90 countries. Overall, Cisco employs 80,000 people and sells its products globally.

Market cap 317.7B

Apr 9, 2021 — Apr 7, 2026Daily1,254 observationsStockStockTechnologyTechnology

Who Moves First

in sync

AAPL and CSCO tend to move at the same time.

Best correlation after shifting: +0.725 (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

-0.022

15 periods · Return correlation when both series rose

Both Falling

+0.644

9 periods · Return correlation when both series fell

Diverging

-0.784

11 periods · Return correlation when series moved apart

R-Squared

52.6%

Share of variance in one series explained by the other.

Trend Agreement

67.7%

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: [0.698, 0.751]

Time Series

Rebased to 100

Green: AAPLGray: CSCO36 of 1,254 points (sampled)

Scatter

XY Regression

112.3120140160180200220240260280285.641.25060708083.6Apple Inc.Cisco Systems, Inc. Common Stock (DE)Data pointsFit (r = 0.725)

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

AAPL logo

Apple Inc.

AAPL

Market cap 3.8T

Stock · 1,254 raw → 1,254 prepared

Series B

CSCO logo

Cisco Systems, Inc. Common Stock (DE)

CSCO

Market cap 317.7B

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

27

Estimated crossover points between normalized spreads.

Slope

0.1687

Linear regression slope.

Intercept

23.7863

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-csco-daily-20260408-ab0etr