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Correlation Analysis

Apple Inc. vs Watsco, Inc.

AAPL vs WSO

+0.694

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

WSO logo

Watsco, Inc.

WSO

Watsco is the largest HVAC and refrigeration products distributor in North America with approximately 13% market share. The company primarily operates in the United States (90% of revenue) with significant exposure in the Sunbelt states. Watsco also has operations in Canada, Latin America, and the Caribbean. The company's customer base comprises more than 120,000 dealers and contractors serving the replacement and new-construction HVAC/R markets for residential and light-commercial applications. As much as 20% of residential HVAC units are distributed through Watsco in any given year. Revenue is approximately 75%-80% residential HVAC and 20%-25% commercial, with relatively small exposure to more complex "applied" solutions.

Market cap 15.4B · 7,050 employees

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

Time Series

Relative Performance

Green: AAPLGray: WSO36 of 1,254 points (sampled)

Who Moves First

WSO leads AAPL by 6 days

WSO tends to move before AAPL.

After testing 13 timing shifts, the strongest relationship was +0.695 (they moved in the same direction).

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

+0.135

14 periods · Return correlation when both series rose

Both Falling

+0.173

10 periods · Return correlation when both series fell

Diverging

-0.489

11 periods · Return correlation when series moved apart

R-Squared

48.1%

Share of variance in one series explained by the other.

Trend Agreement

63.5%

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: [0.664, 0.721]

Scatter

XY Regression

112.3120140160180200220240260280285.6230250300350400450500514.5Apple Inc.Watsco, Inc.Data pointsFit (r = 0.694)

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

WSO logo

Watsco, Inc.

WSO

Market cap 15.4B · 7,050 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

30

Estimated crossover points between normalized spreads.

Slope

1.4291

Linear regression slope.

Intercept

96.0824

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 7 hours ago · ID: stock-aapl-vs-stock-wso-daily-20260408-yyjd9g