CorrlensCorrlens
Correlate

Correlation Analysis

Apple Inc. vs Southwest Airlines Co.

AAPL vs LUV

-0.369

Light 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

LUV logo

Southwest Airlines Co.

LUV

Southwest Airlines is the largest domestic air carrier in the United States by passengers boarded. Southwest operates nearly 800 aircraft in an all-Boeing 737 fleet. Despite offering some longer routes and a few perks for business travelers, the airline predominantly specializes in short-haul, leisure flights operated with a simple cabin configuration in a point-to-point network. In early 2026, Southwest modified its cabins to offer some rows with extra legroom, its ticketing process and merchandising to offer assigned seats, and more fare categories to include a basic economy class that appears for the first time in travel aggregators' search results and more directly competes with other airlines' offerings.

Market cap 18.7B · 77,397 employees

Apr 9, 2021 — Apr 7, 2026Daily1,254 observationsStockStockTechnology

Time Series

Rebased to 100

Green: AAPLGray: LUV36 of 1,254 points (sampled)

Who Moves First

LUV leads AAPL by 6 days

LUV tends to move before AAPL.

Best correlation after shifting: -0.391 (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

-0.554

8 periods · Return correlation when both series rose

Both Falling

-0.096

8 periods · Return correlation when both series fell

Diverging

-0.610

19 periods · Return correlation when series moved apart

R-Squared

13.6%

Share of variance in one series explained by the other.

Trend Agreement

59.1%

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: [-0.416, -0.320]

Scatter

XY Regression

112.3120140160180200220240260280285.619.2203040506066.7Apple Inc.Southwest Airlines Co.Data pointsFit (r = -0.369)

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

LUV logo

Southwest Airlines Co.

LUV

Market cap 18.7B · 77,397 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

19

Estimated crossover points between normalized spreads.

Slope

-0.0803

Linear regression slope.

Intercept

51.7818

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-luv-daily-20260408-z1g62h