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Correlation Analysis

Bank of New York Mellon Corporation vs Costco Wholesale Corp

BK vs COST

+0.835

Strong positive

When one moves up, the other tends to follow.

BK logo

Bank of New York Mellon Corporation

BK

Bank of New York Mellon is a global investment company involved in managing and servicing financial assets throughout the investment lifecycle. The bank provides financial services for institutions, corporations, and individual investors, delivering investment management and services in 35 countries and more than 100 markets. BNY is the largest global custody bank in the world, with $59.3 trillion in under custody or administration (as of December 2025), and can act as a single point of contact for clients looking to create, trade, hold, manage, service, distribute, or restructure investments. BNY's asset-management division manages about $2.2 trillion in assets.

Market cap 85.1B · 48,100 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 pointsStockStockFinancialsConsumer

Time Series

Relative Performance

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

Who Moves First

COST leads BK by 6 days

COST tends to move before BK.

After testing 13 timing shifts, the strongest relationship was +0.835 (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

+0.385

15 periods · Return correlation when both series rose

Both Falling

+0.580

5 periods · Return correlation when both series fell

Diverging

-0.693

15 periods · Return correlation when series moved apart

R-Squared

69.7%

Share of variance in one series explained by the other.

Trend Agreement

56.2%

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: [0.817, 0.851]

Scatter

XY Regression

34.1406080100120131.33064006008001,0001,134Bank of New York Mellon CorporationCostco Wholesale CorpData pointsFit (r = 0.835)

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

BK logo

Bank of New York Mellon Corporation

BK

Market cap 85.1B · 48,100 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

5

Estimated crossover points between normalized spreads.

Slope

7.5241

Linear regression slope.

Intercept

197.2014

Linear regression intercept.

Related Extremes

Highest and Lowest Correlated

Saved 6 hours ago · ID: stock-bk-vs-stock-cost-daily