CorrlensCorrlens
Correlate

Correlation Analysis

Apple Inc. vs Zscaler, Inc. Common Stock

AAPL vs ZS

+0.260

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

ZS logo

Zscaler, Inc. Common Stock

ZS

Zscaler is a software-as-a-service, or SaaS, firm focusing on providing cloud-native cybersecurity solutions to primarily enterprise customers. Zscaler's offerings can be broadly partitioned into Zscaler Internet Access, which provides secure access to external applications, and Zscaler Private Access, which provides secure access to internal applications. The firm is headquartered in San Jose, California, and went public in 2018.

Market cap 22.4B · 7,923 employees

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

Time Series

Rebased to 100

Green: AAPLGray: ZS36 of 1,254 points (sampled)

Who Moves First

ZS leads AAPL by 6 days

ZS tends to move before AAPL.

Best correlation after shifting: +0.273 (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

+0.026

14 periods · Return correlation when both series rose

Both Falling

+0.306

10 periods · Return correlation when both series fell

Diverging

-0.416

11 periods · Return correlation when series moved apart

R-Squared

6.7%

Share of variance in one series explained by the other.

Trend Agreement

64.8%

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: [0.207, 0.310]

Scatter

XY Regression

112.3120140160180200220240260280285.683.6100150200250300339.7Apple Inc.Zscaler, Inc. Common StockData pointsFit (r = 0.26)

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

ZS logo

Zscaler, Inc. Common Stock

ZS

Market cap 22.4B · 7,923 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

0.3722

Linear regression slope.

Intercept

131.3961

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-zs-daily-20260408-53apc5