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Correlation Analysis

Apple Inc. vs Entergy Corporation

AAPL vs ETR

+0.797

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

ETR logo

Entergy Corporation

ETR

Entergy is a holding company with five regulated vertically integrated utilities that generate and distribute electricity to 3 million customers in Arkansas, Louisiana, Mississippi, and Texas. It is one of the largest power producers in the country with 27 gigawatts of rate-regulated owned and leased power generation capacity. Entergy was the second-largest nuclear owner in the US before it began retiring and selling its plants in the Northeast in 2014. It sold its two small gas utilities in Louisiana in 2025.

Market cap 52.4B · 12,233 employees

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

Time Series

Relative Performance

Green: AAPLGray: ETR36 of 1,254 points (sampled)

Who Moves First

AAPL leads ETR by 6 days

AAPL tends to move before ETR.

After testing 13 timing shifts, the strongest relationship was +0.801 (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

-0.205

15 periods · Return correlation when both series rose

Both Falling

+0.021

8 periods · Return correlation when both series fell

Diverging

-0.708

12 periods · Return correlation when series moved apart

R-Squared

63.6%

Share of variance in one series explained by the other.

Trend Agreement

55.8%

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: [0.776, 0.817]

Scatter

XY Regression

112.3120140160180200220240260280285.642.16080100119.2Apple Inc.Entergy CorporationData pointsFit (r = 0.797)

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

ETR logo

Entergy Corporation

ETR

Market cap 52.4B · 12,233 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

27

Estimated crossover points between normalized spreads.

Slope

0.3247

Linear regression slope.

Intercept

2.5485

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 5 hours ago · ID: stock-aapl-vs-stock-etr-daily-20260408-35j20a