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Correlation Analysis

BERKSHIRE HATHAWAY Class B vs Robinhood Markets, Inc. Class A Common Stock

BRK.B vs HOOD

+0.688

Strong positive

When one moves up, the other tends to follow.

BRK.B logo

BERKSHIRE HATHAWAY Class B

BRK.B

Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from its operations to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the companies that make up its manufacturing, service, and retailing operations (which include Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis. Berkshire is expected to generate close to $375 billion in revenue in 2025.

Market cap 1T

HOOD logo

Robinhood Markets, Inc. Class A Common Stock

HOOD

Robinhood is a diversified financial services provider best known for its retail brokerage platform, which historically caters to a young, risk-seeking clientele that trades heavily on margin and in higher-risk asset classes like options, futures, cryptocurrencies, and more recently, in prediction markets. As those customers' financial needs have begun to mature, Robinhood has rolled out a suite of more conventional products, from retirement accounts to high-yield cash sweep accounts to nascent advisory services (Robinhood Strategies). With $322 billion in customer assets and 27 million active accounts at year-end 2025, the firm has emerged as a significant player in the large and quickly growing US brokerage market.

Market cap 62.8B · 2,900 employees

Jul 29, 2021 — Apr 7, 2026Daily1,177 data pointsStockStock

Time Series

Relative Performance

Green: BRK.BGray: HOOD36 of 1,177 points (sampled)

Who Moves First

BRK.B leads HOOD by 6 days

BRK.B tends to move before HOOD.

After testing 13 timing shifts, the strongest relationship was +0.699 (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

+0.625

12 periods · Return correlation when both series rose

Both Falling

N/A

4 periods · Return correlation when both series fell

Diverging

-0.475

19 periods · Return correlation when series moved apart

R-Squared

47.3%

Share of variance in one series explained by the other.

Trend Agreement

57.2%

How often both series moved in the same direction period-to-period.

Overlap Quality

1,177

Deep shared window — 1,177 usable pairs.

Significance

p < 0.001

95% CI: [0.657, 0.717]

Scatter

XY Regression

245.5250300350400450500550556-1.1020406080100120140140.1BERKSHIRE HATHAWAY Class BRobinhood Markets, Inc. Class A Common StockData pointsFit (r = 0.688)

Pipeline

Data quality details

Pipeline Summary

1,177 paired data points survived the daily window.

Raw input

1,254

1,177

Normalized

1,254

1,177

Prepared

1,254

1,177

Aligned

1,177

1,177

Invalid removed

0

A: 0 / B: 0

Duplicates removed

0

A: 0 / B: 0

Alignment drops

77

A: 77 / B: 0

Series A

BRK.B logo

BERKSHIRE HATHAWAY Class B

BRK.B

Market cap 1T

Stock · 1,254 raw → 1,254 prepared

Series B

HOOD logo

Robinhood Markets, Inc. Class A Common Stock

HOOD

Market cap 62.8B · 2,900 employees

Stock · 1,177 raw → 1,177 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

21

Estimated crossover points between normalized spreads.

Slope

0.3046

Linear regression slope.

Intercept

-81.7256

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

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