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Correlation Analysis

Apple Inc. vs Public Storage

AAPL vs PSA

-0.125

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

PSA logo

Public Storage

PSA

Public Storage is the largest owner of self-storage facilities in the US, with more than 3,500 self-storage facilities in 40 states and approximately 258 million square feet of rentable space. Through equity interests, it also has exposure to the European self-storage market through Shurgard Self Storage. The company also has a merchandise business, a third-party property management business, and an insurance business that offers products to cover losses for the goods in self-storage facilities.

Market cap 49.3B · 5,770 employees

Apr 9, 2021 — Apr 7, 2026Daily1,254 observationsStockStockTechnologyReal Estate

Time Series

Rebased to 100

Green: AAPLGray: PSA36 of 1,254 points (sampled)

Who Moves First

PSA leads AAPL by 6 days

PSA tends to move before AAPL.

Best correlation after shifting: -0.140 (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

+0.219

12 periods · Return correlation when both series rose

Both Falling

+0.195

9 periods · Return correlation when both series fell

Diverging

-0.587

14 periods · Return correlation when series moved apart

R-Squared

1.6%

Share of variance in one series explained by the other.

Trend Agreement

57.8%

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: [-0.179, -0.070]

Scatter

XY Regression

112.3120140160180200220240260280285.6225.2250300350400422.2Apple Inc.Public StorageData pointsFit (r = -0.125)

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

PSA logo

Public Storage

PSA

Market cap 49.3B · 5,770 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

23

Estimated crossover points between normalized spreads.

Slope

-0.0926

Linear regression slope.

Intercept

320.2614

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-psa-daily-20260408-y5gbwf