CorrlensCorrlens
Correlate

Correlation Analysis

Comcast Corp vs Costco Wholesale Corp

CMCSA vs COST

-0.627

Moderate inverse

When one moves up, the other tends to move down.

CMCSA logo

Comcast Corp

CMCSA

Comcast is made up of three parts. The core cable business owns networks capable of providing television, internet access, and phone services to 65 million US homes and businesses, or nearly half of the country. The firm provides services to about 47% of the locations in this territory. Comcast acquired NBCUniversal from General Electric in 2011. Following the spinoff of several cable networks, including CNBC, MSNBC, and USA, NBCU now consists of the NBC network, several local NBC affiliates, Bravo, the Peacock streaming platform, Universal Studios, and several theme parks. Finally, Sky, acquired in 2018, is a large television provider in the UK and Italy.

Market cap 99.5B · 179,000 employees

COST logo

Costco Wholesale Corp

COST

Founded in 1983, Costco Wholesale now operates a global chain of membership-based warehouse clubs, delivering high-quality goods and services at consistently low prices. As of its most recent fiscal year, Costco operated approximately 910 warehouses, serving more than 80 million members across its three geographic segments: Costco US (approximately 73% of total revenue), Costco Canada (13%), and Costco International (14%).Costco's core value proposition—quality products at unbeatable prices—has yielded consistently strong member renewal rates (93% in the US and Canada and nearly 90% internationally). About 55% of Costco's fiscal 2025 revenue came from its grocery offerings, and another 25% from general merchandise.

Market cap 451.9B

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

Time Series

Relative Performance

Green: CMCSAGray: COST36 of 1,254 points (sampled)

Who Moves First

COST leads CMCSA by 6 days

COST tends to move before CMCSA.

After testing 13 timing shifts, the strongest relationship was -0.631 (they moved in opposite directions).

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

+0.011

12 periods · Return correlation when both series rose

Both Falling

-0.027

8 periods · Return correlation when both series fell

Diverging

-0.499

15 periods · Return correlation when series moved apart

R-Squared

39.3%

Share of variance in one series explained by the other.

Trend Agreement

60.5%

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: [-0.660, -0.592]

Scatter

XY Regression

24.76253035404550556061.863064006008001,0001,134Comcast CorpCostco Wholesale CorpData pointsFit (r = -0.627)

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

CMCSA logo

Comcast Corp

CMCSA

Market cap 99.5B · 179,000 employees

Stock · 1,254 raw → 1,254 prepared

Series B

COST logo

Costco Wholesale Corp

COST

Market cap 451.9B

Stock · 1,254 raw → 1,254 prepared

Sign agreement

100.0%

How often both values share the same sign.

Zero crossings

3

Estimated crossover points between normalized spreads.

Slope

-16.7290

Linear regression slope.

Intercept

1365.9788

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 7 hours ago · ID: stock-cmcsa-vs-stock-cost-daily