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Correlation Analysis

Apple Inc. vs Natera, Inc. Common Stock

AAPL vs NTRA

+0.792

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

NTRA logo

Natera, Inc. Common Stock

NTRA

Natera Inc is a diagnostic and research company with proprietary molecular and bioinformatics technology. The company's key product offerings include its Panorama Non-Invasive Prenatal Test (NIPT) which screens for chromosomal abnormalities of a fetus as well as in twin pregnancies, typically with a blood draw from the mother, Horizon Carrier Screening (HCS) to determine carrier status for a large number of severe genetic diseases that could be passed on to the carrier's children, Signatera molecular residual disease (MRD) test, which detects circulating tumor DNA in patients previously diagnosed with cancer to assess molecular residual disease and monitor for recurrence; and Prospera, to assess organ transplant rejection.

Market cap 29B · 6,140 employees

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

Time Series

Rebased to 100

Green: AAPLGray: NTRA36 of 1,254 points (sampled)

Who Moves First

NTRA leads AAPL by 2 days

NTRA tends to move before AAPL.

Best correlation after shifting: +0.793 (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

+0.172

14 periods · Return correlation when both series rose

Both Falling

+0.521

9 periods · Return correlation when both series fell

Diverging

-0.696

12 periods · Return correlation when series moved apart

R-Squared

62.8%

Share of variance in one series explained by the other.

Trend Agreement

58.7%

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: [0.771, 0.812]

Scatter

XY Regression

112.3120140160180200220240260280285.62250100150200247.5Apple Inc.Natera, Inc. Common StockData pointsFit (r = 0.792)

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

NTRA logo

Natera, Inc. Common Stock

NTRA

Market cap 29B · 6,140 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

24

Estimated crossover points between normalized spreads.

Slope

1.0925

Linear regression slope.

Intercept

-103.3825

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-ntra-daily-20260408-sm9yb9