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Correlation Analysis

Apple Inc. vs Coherent Corp.

AAPL vs COHR

-0.135

Weak 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

C

Coherent Corp.

COHR

Coherent Corp is a vertically integrated manufacturing company that develops, manufactures, and markets lasers, transceivers, and other optical and optoelectronic devices, modules, and systems, as well as engineered materials, for use in the communications, industrial, instrumentation, and electronics markets. Its reporting segments are Datacenter Communications and Industrial. Its geographic areas are North America, Europe, China, Japan, and the rest of the world.

Market cap 47.5B · 30,000 employees

Apr 9, 2021 — Apr 7, 2026Daily1,207 observationsStockStockTechnology

Who Moves First

COHR leads AAPL by 6 days

COHR tends to move before AAPL.

Best correlation after shifting: -0.154 (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

-0.231

11 periods · Return correlation when both series rose

Both Falling

+0.596

6 periods · Return correlation when both series fell

Diverging

-0.289

18 periods · Return correlation when series moved apart

R-Squared

1.8%

Share of variance in one series explained by the other.

Trend Agreement

64.3%

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

Overlap Quality

1,207

Deep shared window — 1,207 usable pairs.

Significance

p < 0.001

95% CI: [-0.190, -0.080]

Time Series

Rebased to 100

Green: AAPLGray: COHR36 of 1,207 points (sampled)

Scatter

XY Regression

113.4120140160180200220240260280285.78.550100150200250286.4Apple Inc.Coherent Corp.Data pointsFit (r = -0.135)

Pipeline

Data quality details

Pipeline Summary

1,207 paired observations survived the daily window.

Raw input

1,254

1,207

Normalized

1,254

1,207

Prepared

1,254

1,207

Aligned

1,207

1,207

Invalid removed

0

A: 0 / B: 0

Duplicates removed

0

A: 0 / B: 0

Alignment drops

47

A: 47 / B: 0

Series A

AAPL logo

Apple Inc.

AAPL

Market cap 3.8T

Stock · 1,254 raw → 1,254 prepared

Series B

C

Coherent Corp.

COHR

Market cap 47.5B · 30,000 employees

Stock · 1,207 raw → 1,207 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

6

Estimated crossover points between normalized spreads.

Slope

-0.3028

Linear regression slope.

Intercept

183.2430

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-cohr-daily-20260408-lsbvmg