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Correlation Analysis

Apple Inc. vs Interactive Brokers Group, Inc. Class A Common Stock

AAPL vs IBKR

+0.880

Very 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

IBKR logo

Interactive Brokers Group, Inc. Class A Common Stock

IBKR

Interactive Brokers is a large, automated, retail and institutional brokerage that boasted nearly $780 billion in customer equity at the end of 2025. The company cut its teeth as a market maker, introducing US financial markets to automated and algorithmic training before expanding into brokerage services in 1993. The firm has a wide-ranging client base, with its best-in-class order execution and extremely low margin lending rates catering to a sophisticated audience of hedge funds, proprietary traders, and introducing brokers that account for about 45% of the firm's commissions. With operations spanning more than 160 electronic exchanges, 36 countries, and 28 currencies, Interactive Brokers caters to a global clientele, with more than 80% of active accounts sitting outside the US.

Market cap 30.6B · 3,182 employees

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

Time Series

Rebased to 100

Green: AAPLGray: IBKR36 of 1,254 points (sampled)

Who Moves First

IBKR leads AAPL by 6 days

IBKR tends to move before AAPL.

Best correlation after shifting: +0.881 (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

-0.055

13 periods · Return correlation when both series rose

Both Falling

+0.842

7 periods · Return correlation when both series fell

Diverging

-0.600

15 periods · Return correlation when series moved apart

R-Squared

77.5%

Share of variance in one series explained by the other.

Trend Agreement

58.8%

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: [0.867, 0.892]

Scatter

XY Regression

112.3120140160180200220240260280285.69.41020304050607077.8Apple Inc.Interactive Brokers Group, Inc. Class A Common StockData pointsFit (r = 0.88)

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

IBKR logo

Interactive Brokers Group, Inc. Class A Common Stock

IBKR

Market cap 30.6B · 3,182 employees

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

45

Estimated crossover points between normalized spreads.

Slope

0.3967

Linear regression slope.

Intercept

-43.2818

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 3 hours ago · ID: stock-aapl-vs-stock-ibkr-daily-20260408-wx5okl