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Correlation Analysis

Apple Inc. vs Northern Trust Corp

AAPL vs NTRS

+0.373

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

NTRS logo

Northern Trust Corp

NTRS

Northern Trust is a leading provider of wealth management, asset servicing, asset management, and banking to corporations, institutions, affluent families, and individuals. Founded in Chicago in 1889, Northern Trust has offices in 20 states and Washington, D.C. as well as 23 locations in Canada, Europe, the Middle East, and Asia-Pacific. As of December 2025, Northern Trust had assets under custody or administration of $18.7 trillion and assets under management of $1.8 trillion.

Market cap 26.6B · 23,800 employees

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

Time Series

Relative Performance

Green: AAPLGray: NTRS36 of 1,254 points (sampled)

Who Moves First

in sync

AAPL and NTRS tend to move at the same time.

After testing 13 timing shifts, the strongest relationship was +0.373 (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

+0.077

11 periods · Return correlation when both series rose

Both Falling

+0.575

6 periods · Return correlation when both series fell

Diverging

-0.576

18 periods · Return correlation when series moved apart

R-Squared

13.9%

Share of variance in one series explained by the other.

Trend Agreement

60.5%

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: [0.325, 0.420]

Scatter

XY Regression

112.3120140160180200220240260280285.658.76080100120140152.1Apple Inc.Northern Trust CorpData pointsFit (r = 0.373)

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

NTRS logo

Northern Trust Corp

NTRS

Market cap 26.6B · 23,800 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

17

Estimated crossover points between normalized spreads.

Slope

0.1862

Linear regression slope.

Intercept

67.2025

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 5 hours ago · ID: stock-aapl-vs-stock-ntrs-daily-20260408-vt8u7o