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Correlation Analysis

Apple Inc. vs Ross Stores Inc

AAPL vs ROST

+0.798

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

ROST logo

Ross Stores Inc

ROST

Ross Stores, founded in 1982, is a US-focused off-price apparel and home fashion retailer operating more than 2,100 stores across 43 states, primarily under the Ross Dress for Less banner, with a smaller footprint through DD's Discounts. In fiscal 2024, the company generated over $21 billion in sales. Ross offers branded apparel, footwear, accessories, and home goods at a 20%-60% discount to department and specialty store prices, sourcing closeouts and excess inventory from vendors worldwide.

Market cap 71.3B · 111,000 employees

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

Time Series

Relative Performance

Green: AAPLGray: ROST36 of 1,254 points (sampled)

Who Moves First

AAPL leads ROST by 6 days

AAPL tends to move before ROST.

After testing 13 timing shifts, the strongest relationship was +0.800 (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

-0.372

10 periods · Return correlation when both series rose

Both Falling

+0.181

7 periods · Return correlation when both series fell

Diverging

-0.757

18 periods · Return correlation when series moved apart

R-Squared

63.7%

Share of variance in one series explained by the other.

Trend Agreement

63.2%

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: [0.777, 0.817]

Scatter

XY Regression

112.3120140160180200220240260280285.671.880100120140160180200220227Apple Inc.Ross Stores IncData pointsFit (r = 0.798)

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

ROST logo

Ross Stores Inc

ROST

Market cap 71.3B · 111,000 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

68

Estimated crossover points between normalized spreads.

Slope

0.5556

Linear regression slope.

Intercept

22.9679

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

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