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Correlation Analysis

Apple Inc. vs Blackrock, Inc.

AAPL vs BLK

+0.718

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

BLK logo

Blackrock, Inc.

BLK

BlackRock is the largest asset manager in the world, with $14.041 trillion in assets under management at the end of December 2025. Its product mix is diverse, with 55% of managed assets in equity strategies, 23% in fixed income, 9% in multi-asset classes, 6% in money market funds, and 5% in alternatives. Passive strategies account for more than two-thirds of long-term AUM, with the company's ETF platform maintaining a leading market share domestically and on a global basis. Product distribution is weighted more toward institutional clients, which, by our calculations, account for around 80% of AUM. BlackRock is geographically diverse, with clients in more than 100 countries and more than one-third of managed assets coming from investors domiciled outside the US and Canada.

Market cap 149.2B · 24,900 employees

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

Time Series

Relative Performance

Green: AAPLGray: BLK36 of 1,254 points (sampled)

Who Moves First

BLK leads AAPL by 2 days

BLK tends to move before AAPL.

After testing 13 timing shifts, the strongest relationship was +0.718 (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

+0.150

12 periods · Return correlation when both series rose

Both Falling

+0.516

10 periods · Return correlation when both series fell

Diverging

-0.547

13 periods · Return correlation when series moved apart

R-Squared

51.6%

Share of variance in one series explained by the other.

Trend Agreement

64.1%

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: [0.690, 0.744]

Scatter

XY Regression

112.3120140160180200220240260280285.65676007008009001,0001,1001,143Apple Inc.Blackrock, Inc.Data pointsFit (r = 0.718)

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

BLK logo

Blackrock, Inc.

BLK

Market cap 149.2B · 24,900 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

16

Estimated crossover points between normalized spreads.

Slope

2.7672

Linear regression slope.

Intercept

321.1735

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

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