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Correlation Analysis

Apple Inc. vs PG&E Corporation

AAPL vs PCG

+0.611

Moderate 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

PCG logo

PG&E Corporation

PCG

PG&E is a holding company whose main subsidiary is Pacific Gas and Electric, a regulated utility operating in Central and Northern California that serves 5.3 million electricity customers and 4.6 million gas customers in 47 of the state's 58 counties. PG&E operated under bankruptcy court supervision in 2001-04 during California's energy crisis and in 2019-20 due to wildfire losses. In 2004, PG&E sold its unregulated assets as part of its first postbankruptcy reorganization.

Market cap 38.8B · 29,000 employees

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

Time Series

Rebased to 100

Green: AAPLGray: PCG36 of 1,254 points (sampled)

Who Moves First

in sync

AAPL and PCG tend to move at the same time.

Best correlation after shifting: +0.611 (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

-0.175

12 periods · Return correlation when both series rose

Both Falling

-0.480

7 periods · Return correlation when both series fell

Diverging

-0.444

16 periods · Return correlation when series moved apart

R-Squared

37.4%

Share of variance in one series explained by the other.

Trend Agreement

54.6%

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: [0.575, 0.645]

Scatter

XY Regression

112.3120140160180200220240260280285.68.4510121416182020.98Apple Inc.PG&E CorporationData pointsFit (r = 0.611)

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

PCG logo

PG&E Corporation

PCG

Market cap 38.8B · 29,000 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

21

Estimated crossover points between normalized spreads.

Slope

0.0448

Linear regression slope.

Intercept

6.7194

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-pcg-daily-20260408-tjxh8g