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Correlate

Correlation Analysis

Apple Inc. vs Northrop Grumman Corp.

AAPL vs NOC

+0.693

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

NOC logo

Northrop Grumman Corp.

NOC

Northrop Grumman is a diversified defense contractor providing aeronautics, defense, and space systems. The company's aerospace segment produces autonomous and piloted aircraft such as Global Hawk drones and the new B-21 bomber, creates the fuselage for the massive F-35 program, and maintains and upgrades numerous other military aircraft. Defense systems makes artillery and missile ammunition and guidance systems, long-range missiles, and missile defense systems. Mission systems creates and integrates a variety of radar, navigation, and communication systems for avionics, weapons control, and countermeasures on a range of platforms from helicopters to destroyers. Space systems produces satellites, sensors, space structures, and rocket motors.

Market cap 98.8B · 95,000 employees

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

Time Series

Relative Performance

Green: AAPLGray: NOC36 of 1,254 points (sampled)

Who Moves First

AAPL leads NOC by 6 days

AAPL tends to move before NOC.

After testing 13 timing shifts, the strongest relationship was +0.696 (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

-0.495

8 periods · Return correlation when both series rose

Both Falling

+0.340

5 periods · Return correlation when both series fell

Diverging

-0.476

22 periods · Return correlation when series moved apart

R-Squared

48.0%

Share of variance in one series explained by the other.

Trend Agreement

51.8%

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: [0.663, 0.720]

Scatter

XY Regression

112.3120140160180200220240260280285.6312400500600700723Apple Inc.Northrop Grumman Corp.Data pointsFit (r = 0.693)

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

NOC logo

Northrop Grumman Corp.

NOC

Market cap 98.8B · 95,000 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

65

Estimated crossover points between normalized spreads.

Slope

1.3343

Linear regression slope.

Intercept

225.0615

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 5 hours ago · ID: stock-aapl-vs-stock-noc-daily-20260408-fzb7ss