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Correlate

Correlation Analysis

Costco Wholesale Corp vs Northrop Grumman Corp.

COST vs NOC

+0.657

Strong positive

When one moves up, the other tends to follow.

COST logo

Costco Wholesale Corp

COST

Founded in 1983, Costco Wholesale now operates a global chain of membership-based warehouse clubs, delivering high-quality goods and services at consistently low prices. As of its most recent fiscal year, Costco operated approximately 910 warehouses, serving more than 80 million members across its three geographic segments: Costco US (approximately 73% of total revenue), Costco Canada (13%), and Costco International (14%).Costco's core value proposition—quality products at unbeatable prices—has yielded consistently strong member renewal rates (93% in the US and Canada and nearly 90% internationally). About 55% of Costco's fiscal 2025 revenue came from its grocery offerings, and another 25% from general merchandise.

Market cap 451.9B

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 pointsStockStockConsumerIndustrials

Time Series

Relative Performance

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

Who Moves First

in sync

COST and NOC tend to move at the same time.

After testing 13 timing shifts, the strongest relationship was +0.657 (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

+0.479

10 periods · Return correlation when both series rose

Both Falling

N/A

4 periods · Return correlation when both series fell

Diverging

-0.538

21 periods · Return correlation when series moved apart

R-Squared

43.1%

Share of variance in one series explained by the other.

Trend Agreement

56.9%

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: [0.624, 0.687]

Scatter

XY Regression

3064006008001,0001,134312400500600700723Costco Wholesale CorpNorthrop Grumman Corp.Data pointsFit (r = 0.657)

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

COST logo

Costco Wholesale Corp

COST

Market cap 451.9B

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

7

Estimated crossover points between normalized spreads.

Slope

0.2417

Linear regression slope.

Intercept

311.5548

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 7 hours ago · ID: stock-cost-vs-stock-noc-daily